دستور زبان پیش دانشگاهی

 

Chapter One

1. Change the following pairs of words into sentences, using the correct forms of the Simple Present of the verb to be. For example:
      I, cautious
      I am cautious.

      they, friendly
      They are friendly.

1. you, careful
2. it, warm
3. he, here
4. we, bold
5. they, careless
6. she, clever
7. we, ready
8. you, reckless
9. I, shy
10. they, polite

2. Using the Simple Present of the verb to be, and making sure that the word order is correct, form the following groups of words into grammatically correct statements or questions. If the symbol ? is present, form the words into a question. If the word not is present, form the words into a negative statement or negative question. Do not use contractions in this exercise. For example:
      it, brown
      It is brown.

      you, ?, excited
      Are you excited?

      I, satisfied, not
      I am not satisfied.

      not, ?, they, ready
      Are they not ready?

1. you, ?, hungry
2. we, ?, not, correct
3. he, ?, happy
4. not, ?, it, cold
5. she, here
6. I, early, ?
7. they, wrong, not
8. you, ?, comfortable
9. they, ?, not, strong
10. not, ?, I, fortunate
11. it, slippery, ?
12. not, you, late
13. it, not, ?, important
14. we, famous
15. they, present, ?

Chapter Two

1. Using the Simple Present tense, fill in the blanks with the correct forms of the verbs shown in brackets. For example:
      I ______ to the radio. (to listen)
      I listen to the radio.

      He _______ to the radio. (to listen)
      He listens to the radio.

1. She __________ the guitar. (to play)
2. We __________ soccer. (to play)
3. They _________ to talk. (to like)
4. He __________ ice cream. (to like)
5. You _________ your friends often. (to call)
6. He _________ the office every day. (to call)
7. She __________ regularly. (to practise)
8. They __________ once a week. (to practise)
9. We __________ here. (to shop)
10. It __________ delicious. (to taste)

2. Using the Simple Present tense, fill in the blanks with the correct forms of the verb to have. For example:
      I ____ a pen.
      I have a pen.

      He ___ two pencils.
      He has two pencils.

1. I _______ many books.
2. You _______ an apartment.
3. He _______ a bicycle.
4. We _______ fun.
5. They _______ two sleds.
6. She _______ milk in her tea.
7. I _______ a warm sweater.
8. We _______ breakfast at eight o'clock.
9. He _______ an alarm clock.
10. They ________ a sense of humor.

3. Change the following affirmative statements into questions. For example:
      She walks to work.
      Does she walk to work?

      They take the bus.
      Do they take the bus?

1. I hurry home.
2. He drives a truck.
3. You follow the news.
4. They want a pet.
5. She likes flowers.
6. We need tea.
7. She answers the questions.
8. He drinks coffee.
9. I learn quickly.
10. It rains heavily.


Chapter Three

1. Using the Present Continuous tense, fill in the blanks with the correct forms of the verbs shown in brackets. For example:
      He _________ hard. (to work)
      He is working hard.

      We ____________ anxious. (to feel)
      We are feeling anxious.

1. I _______________ the questions. (to answer)
2. You ________________ boots. (to wear)
3. We ______________ for work. (to look)
4. She ______________ her friend. (to call)
5. He _______________ a house. (to build)
6. They _______________ supper. (to cook)
7. We ______________ a story. (to tell)
8. You ______________ for the bus. (to wait)
9. I _______________ a book. (to read)
10. They _______________ berries. (to pick)


2. Change the following affirmative statements into questions. For example:
      It is snowing.
      Is it snowing?

      They are being cautious.
      Are they being cautious?

1. I am learning English.
2. You are carrying a parcel.
3. It is growing colder.
4. We are living in Halifax.
5. They are running a race.
6. He is drinking coffee.
7. She is shopping for presents.
8. I am cleaning the window.
9. We are buying pencils.
10. They are playing football.

3. For each of the following sentences, determine whether the Simple Present tense or the Present Continuous tense is more appropriate, and fill in the blank with the correct form of the verb given in brackets. For example:
      Right now, he ________ ridiculous. (to be)
      Right now, he is being ridiculous.

      She ______ to Sydney every weekend. (to drive)
      She drives to Sydney every weekend.

1. At the moment, I __________________ supper. (to cook)
2. He ________________ the paper every weekday. (to read)
3. We ________________ right now. (to study)
4. She ________________ every day. (to study)
5. Now it _______________. (to rain)
6. They ______________ to Mexico every year. (to travel)
7. Just now we ________________ the shopping. (to do)
8. She always ________________ correctly.( to answer)
9. You ________________ never late. (to be)
10. Now I ________________ to the radio. (to listen)
11. Each Sunday, we ________________ the flea market. (to visit)
12. At present, I ________________ for work. (to look)

 

Chapter Four

1. Using the Simple Past tense, fill in the blanks with the correct forms of the verb to be. For example:
      I ___ calm.
      I was calm.

      You ____ right.
      You were right.

1. He ________ happy.
2. We _________ students.
3. They ________ ambitious.
4. You _________ clever.
5. It _________ hot.
6. I _________ busy.
7. We _________ patient.
8. She _________ eleven years old.
9. They ________ intelligent.
10. He _________ in a hurry.

2. Rewrite the following affirmative statements as questions, negative statements, negative questions without contractions, negative questions with contractions, and affirmative statements followed by negative tag questions. For example:
      You were on time.
      Were you on time?
      You were not on time.
      Were you not on time?
      Weren't you on time?
      You were on time, weren't you?

      It was warm enough.
      Was it warm enough?
      It was not warm enough.
      Was it not warm enough?
      Wasn't it warm enough?
      It was warm enough, wasn't it?

1. I was late.
2. They were in a hurry.
3. He was an artist.
4. We were right.
5. She was there.

3. Paying attention to the correct spelling, fill in the blanks with the Simple Past of the regular verbs shown in brackets. For example:
      It _______ raining. (to stop)
      It stopped raining.

      I _________ myself. (to disguise)
      I disguised myself.

1. She _____________ through the book. (to flip)
2. We _____________ the traffic. (to watch)
3. You _____________ the flowers carefully. (to arrange)
4. He _____________ about his success. (to brag)
5. They _____________ sightseeing. (to enjoy)
6. He _____________ us with pencils. (to supply)
7. I _____________ the child. (to reassure)
8. We _____________ for them. (to wait)
9. They _____________ the books overseas. (to ship)
10. She ____________ too much. (to worry)

4. Referring to the table of English irregular verbs if necessary, fill in the blanks with the Simple Past tense of the irregular verbs shown in brackets. For example:
      They _____ a song. (to write)
      They wrote a song.

      We _____ the floor. (to sweep)
      We swept the floor.

1. She ____________ the dishes. (to do)
2. They ___________ for a walk. (to go)
3. He __________ his time. (to take)
4. I ___________ the beds. (to make)
5. They ___________ to catch the bus. (to run)
6. She ___________ up quickly. (to get)
7. You ___________ the coffee. (to drink)
8. We ___________ soundly. (to sleep)
9. He ___________ his books. (to forget)
10. I ___________ the house. (to leave)

5. Paying attention to the correct forms of the bare infinitives, change the following affirmative statements into negative statements. For example:
      I scanned the newspaper.
      I did not scan the newspaper.

      They flew to Toronto.
      They did not fly to Toronto.

1. We enjoyed ourselves.
2. She pinned on the brooch.
3. I fanned myself.
4. They emptied their pockets.
5. You replied at once.
6. He went to work.
7. We swam across the river.
8. They took the bus.
9. I shut the windows.
10. You ran fast.


6. Rewrite the following sentences, changing the underlined verbs from the Simple Past to the form with used followed by the infinitive. For example:
      They took the bus.
      They used to take the bus.

      She traveled every year.
      She used to travel every year.

1. It snowed heavily.
2. I came often.
3. We were neighbors.
4. He wrote many letters.
5. They walked to work.
6. He teased us.
7. She told us stories.
8. You rode a bicycle.

 

Chapter Five

1. Using the Past Continuous tense, fill in the blanks with the correct forms of the verbs shown in brackets. For example:
      I __________ a salad. (to make)
      I was making a salad.

      They ___________ to find some boots. (to try)
      They were trying to find some boots.

1. He _______________ a book. (to read)
2. We _________________ money. (to save)
3. She _______________ school. (to attend)
4. It ________________. (to thunder)
5. They ________________ for the exam. (to study)
6. We ________________ ourselves. (to sun)
7. They ________________ they way. (to lead)
8. You _______________ by bus. (to leave)
9. We ________________ through the snow. (to plod)
10. You _______________ your goals. (to attain)


 

Chapter Six

1. Using either the auxiliary shall or the auxiliary will for the first person, fill in the blanks with the Simple Future of the verbs shown in brackets. For example:
      I ___________. (to agree)
      I shall agree or I will agree.

      You ____________ the results. (to publish)
      You will publish the results.

1. We ___________. (to succeed)
2. They _________________ the site. (to excavate)
3. He _________________ the situation. (to study)
4. We _________________. (to hurry)
5. I _________________ soon. (to follow)
6. It _________________ a surprise. (to be)
7. He _________________ us. (to remind)
8. She _________________ tomorrow. (to depart)
9. I _________________ here. (to remain)
10. They __________________ university. (to enter)

2. The following sentences refer to future events. Complete each sentence by filling in the blank with the correct form of the Present Continuous tense of to go, followed by the infinitive of the verb shown in brackets. For example:
      She _________________ swimming. (to teach)
      She is going to teach swimming.

      ___ we _____________ home? (to walk)
      Are we going to walk home?

      He __ not _____________ us. (to find)
      He is not going to find us.

1. ______ he ____________________ horseback riding? (to learn)
2. I __________________________ the windows. (to wash)
3. ______ you ____________________ with us? (to come)
4. It ______ not ____________________ cold tonight. (to be)
5. ______ he not ____________________ the letter? (to answer)
6. We _________________________ to the library. (to go)
7. ______ she ____________________ a sweater? (to buy)
8. ______ you not ___________________ us? (to call)
9. I ______ not ____________________ late. (to stay)
10. They ________________________ supper. (to cook)

Chapter Seven


1. Complete the following sentences, using the indicated verbs in the Simple conjugation with the auxiliary would. For example:
      I __________ some coffee. (to like)
      I would like some coffee.

      _____ he _______ us? (to believe)
      Would he believe us?

      They _____ not ____ the interruption. (to mind)
      They would not mind the interruption.

      _____ you not ______ to stay at home? (to prefer)
      Would you not prefer to stay at home?

1. We ____________ our best. (to try)
2. _______ you not __________ your glasses? (to need)
3. I ________________ everything carefully. (to plan)
4. _______ they _____________ us? (to remember)
5. _______ he not ________ willing to help them? (to be)
6. _______ she not ________ a good job? (to do)
7. We _______ not __________ much luggage. (to bring)
8. _______ they _____________ their decision? (to reconsider)
9. You _______________ a great deal. (to learn)
10. _______ he not ____________ the tickets ahead of time? (to purchase)

2. Complete the following polite requests and suggestions, using the indicated verbs in the Simple conjugation with the auxiliary would. For example:
      _____ you ____ some help? (to like)
      Would you like some help?

      _____ you please ____ me the way to the post office? (to tell)
      Would you please tell me the way to the post office?

1. _________ you _________ for some coffee? (to care)
2. ________ you not _________ to visit the library? (to prefer)
3. I think it ______________ wise to let them know. (to be)
4. _________ you please __________ here? (to wait)
5. I _________ not _____________ that excursion. (to recommend)
6. _________ you ___________ the door open? (to hold)


Chapter Eight

1. Complete the following sentences by filling in the blanks with the Imperative form of the verbs shown in brackets. For example:
      ____ the door. (to open)
      Open the door.

      Don't ______ to come. (to forget)
      Don't forget to come.

1. Don't __________ out late. (to stay)
2. Please _________ ready on time. (to be)
3. Don't ___________ about that. (to worry)
4. _________ your own business! (to mind)
5. _________ careful not to trip. (to be)
6. Do not ____________ everything you hear. (to believe)
7. Always ___________ both ways before crossing the street. (to look)
8. You __________ here while I go into the store. (to wait)
9. __________ me! (to excuse)
10. _________ me a postcard if you have time. (to send)

 

Chapter Nine

1. Change the following affirmative statements into questions. For example:
      I may go.
      May I go?

      We could have found it.
      Could we have found it?

1. I must leave at four o'clock.
2. He might be leaving for work now.
3. We can solve the puzzle.
4. You should have called him.
5. They could have been waiting for the bus.
6. I shall go out now.
7. You will have finished the book.
8. We should be making the arrangements.
9. She would like to know the answer.
10. They can explain what happened.


2. Rewrite the following sentences, putting the underlined verbs into the future. For example:
      They can explain the situation to us.
      They will be able to explain the situation to us.

      May they leave whenever they wish?
      Will they be allowed to leave whenever they wish?

      She must obtain a license.
      She will have to obtain a license.

1. She can describe it to you.
2. You must lock the doors when you leave.
3. He can follow the instructions.
4. May they stay overnight?
5. We must remember to buy groceries.
6. She can finish the work on time.
7. Must he take his glasses with him?
8. Can they buy the tickets in advance?
9. She must learn to be more careful.
10. You may choose your own seat.

3. Add negative tag questions to the following affirmative statements. For example:
      They are lucky.
      They are lucky, aren't they?

      You know what I mean.
      You know what I mean, don't you?

      We will tell him the truth.
      We will tell him the truth, won't we?

      She could try harder.
      She could try harder, couldn't she?

1. You are cold.
2. They passed the test.
3. I can do this well.
4. You live near the school.
5. He went downtown.
6. We should call them.
7. She likes toffee.
8. They could help us.
9. I won the race.
10. You were reading.
11. He rides a bicycle.
12. We would need more time.


4. Write affirmative short answers to the following questions. For example:
      Is he thirsty?
      Yes, he is.

      Haven't they read the book?
      Yes, they have.

      Can they finish the work by themselves?
      Yes, they can.

      Should she leave now?
      Yes, she should.

1. Do we need any butter?
2. May they send for you?
3. Is she sure she is right?
4. Does he enjoy studying?
5. Had they been meaning to call us?
6. Couldn't he send us the information?
7. Would she like to listen to the radio?
8. Had he been wanting to travel?

5. Write negative short answers to the following questions. For example:
      Wasn't he thirsty?
      No, he wasn't.

      Were they watching television?
      No, they weren't.

      Should we turn left here?
      No, we shouldn't.

      Will they want some coffee?
      No, they won't.

1. Isn't she driving her own car?
2. Will he be visiting Denmark?
3. Would she mind?
4. Could they understand everything?
5. Will she have to get up early?
6. Should he warn them?
7. Didn't we sell all the chocolate bars?
8. Couldn't they find any evidence?

6. Add the short form construction using the words and so to each of the following affirmative statements. Use the subjects shown in brackets. For example:
      He is lucky. (I)
      He is lucky, and so am I.

      She likes chocolate. (you)
      She likes chocolate, and so do you.

      They can swim well. (we)
      They can swim well, and so can we.

1. We are thirsty. (they)
2. You have been helpful. (she)
3. I swam to the island. (he)
4. He was riding a horse. (you)
5. They can understand Dutch. (we)
6. She enjoyed the trip. (I)
7. You should study hard. (they)
8. He reads a great deal. (she)

7. Add the short form construction using the words and neither to each of the following negative statements. Use the subjects shown in brackets. For example:
      He is not angry. (we)
      He is not angry, and neither are we.

      They didn't visit you. (I)
      They didn't visit you, and neither did I.

      I couldn't understand it. (she)
      I couldn't understand it, and neither could she.

1. You haven't finished supper. (she)
2. He couldn't tell the time. (they)
3. She is not planning to go. (we)
4. We didn't wait long. (he)
5. He has not been feeling well. (I)
6. She cannot run fast. (they)
7. We do not own a canary. (he)
8. You won't be needing an umbrella. (we)

 

Chapter Ten

1. In each of the following sentences, underline the direct object of the verb. For example:
      She forgot the pencils.
      She forgot the pencils.

      Was he writing a letter?
      Was he writing a letter?

      You did not answer the question.
      You did not answer the question.

1. I watched the birds.
2. He did not close the window.
3. She rang the bell.
4. Did you find the answer?
5. I opened the door.
6. Did she play the violin?
7. You will need an umbrella.
8. They are not carrying the parcels.
9. You organized the race.
10. Were they using the blankets?

2. In the following sentences, the direct objects of the verbs are printed in bold type. In addition, each sentence contains an adverb or adverb phrase indicating time. Depending upon whether or not there is a direct object, complete each sentence using either to lay or to lie, as appropriate. Use the Present Continuous tense if the action takes place in the present, and use the Simple Past tense if the action took place in the past. For example:
      They __________ the bricks now.
      They are laying the bricks now.

      I _______ the money on the counter last night.
      I laid the money on the counter last night.

      Right now, the dogs _________ in the middle of the road.
      Right now, the dogs are lying in the middle of the road.

      Yesterday, he ___ in bed until ten o'clock.
      Yesterday, he lay in bed until ten o'clock.

1. Now I ______________ too close to the fire.
2. Last night he _____________ twenty dollars on top of the bookcase.
3. Right now she _______________ a fire.
4. Until last year, the treasure ______________ hidden under the earth.
5. Yesterday she ______________ her coat on the bed.
6. His books _____________ on the floor all last week.
7. Right now he _______________ low in order to stay out of danger.
8. Yesterday morning he ______________ the parcel close to the door.
9. Last night they _____________ in wait for the thieves.
10. Now they ________________ their cards on the table.

3. In the following sentences, the direct objects of the verbs are printed in bold type. In addition, each sentence contains an adverb or adverb phrase indicating time. Depending upon whether or not there is a direct object, complete each sentence using either to raise or to rise, as appropriate. Use the Present Continuous tense if the action takes place in the present; and use the Simple Past tense if the action took place in the past. For example:
      Right now, he __________ sheep.
      Right now, he is raising sheep.

      Last night he ______ their expectations.
      Last night he raised their expectations.

      The price of housing _________ now.
      The price of housing is rising now.

      Last year she ______ at six o'clock every morning.
      Last year she rose at six o'clock every morning.

1. Last night, when we heard the news, our hopes _____________.
2. Last year they _________ six hundred dollars by selling chocolate bars.
3. Now they ______________ the price of gasoline.
4. The price of gold _____________ yesterday.
5. At the moment, he ______________ corn.
6. Right now mist _______________ from the water.
7. Last week, you _____________ a difficult question.
8. The temperature _____________ at the moment.
9. Now he _____________ his hat.
10. The water level ______________ last week.

4. In the following sentences, the direct objects of the verbs are printed in bold type. In addition, each sentence contains an adverb or adverb phrase indicating time. Depending upon whether or not there is a direct object, complete each sentence using either to set or to sit, as appropriate. Use the Present Continuous tense if the action takes place in the present; and use the Simple Past tense if the action took place in the past. For example:
      Now they ___________ the table.
      Now they are setting the table.

      Last night we ___ our alarm clock for six o'clock.
      Last night we set our alarm clock for six o'clock.

      At the moment, the cat __________ on top of the car.
      At the moment, the cat is sitting on top of the car.

      Yesterday he ___ at his desk all afternoon.
      Yesterday he sat at his desk all afternoon.

1. Right now they ______________ down to a good meal.
2. Yesterday they _____________ the empty bottles on the front step.
3. At the moment, she _______________ in front of the fire.
4. Now we _______________ the suitcases on the moving belt.
5. In ancient times, King Arthur's knights ____________ at the Round Table.
6. Yesterday morning the doctor _____________ the broken bone.
7. Right now, we _______________ around the table.
8. He ______________ a good example last week, by studying hard.
9. Now she ______________ her watch to the correct time.
10. Yesterday afternoon we ___________ at the end of the dock, in the sun.

5. Rewrite each of the following sentences, omitting the underlined preposition which precedes the indirect object, and making the necessary changes in word order. For example:
      I bought a rose for the singer.
      I bought the singer a rose.

      She gave an apple to the boy.
      She gave the boy an apple.

1. I handed the book to the student.
2. He wrote a letter to the twins.
3. She made a scarf for the girl.
4. I told the story to the audience.
5. We paid the money to the dentist.
6. He sent a reply to the doctor.
7. We offered the job to the students.
8. She told the news to her friends.

6. Rewrite each of the following sentences, inserting the preposition to before the indirect object, and making the necessary changes in word order. For example:
      I wrote the president a letter.
      I wrote a letter to the president.

      They showed the visitor the garden.
      They showed the garden to the visitor.

1. We sent the reporters a photograph.
2. They mailed the agency a postcard.
3. I paid the manager the fee.
4. We sold the students the doughnuts.
5. You read the teacher the story.
6. She mailed the seamstress the material.
7. I sent the workers a message.
8. He offered his guest the wine.

 

Chapter Eleven

1. For each of the following sentences, change the subject of the verb to the plural, and change the verb so that it agrees with its subject. For example:
      The room is large.
      The rooms are large.

      The letter was delivered yesterday.
      The letters were delivered yesterday.

      The tourist has a map.
      The tourists have a map.

      The girl studies hard.
      The girls study hard.

1. The book was heavy.
2. The train has left.
3. The bird was singing.
4. The door was closed by the superintendent.
5. The shoe fits well.
6. The parcel is being opened.
7. The newspaper is read by many people.
8. The flame is flickering.
9. The ship has been sighted.
10. The street was being cleaned.

2. For each of the following sentences, change the subject of the verb to the plural, and change the verb so that it agrees with its subject. For example:
      The knife has been sharpened.
      The knives have been sharpened.

      The reef attracts tourists.
      The reefs attract tourists.

      The thief will be caught.
      The thieves will be caught.

1. The leaf has turned red.
2. The fife had the solo.
3. The calf is hungry.
4. The scarf kept him warm.
5. The knife will be useful.
6. The giraffe was eating leaves.
7. The cliff is being explored by geologists.
8. The wolf howls every night.
9. The loaf is rising.
10. The chief will decide.
11. The shelf is being used.
12. The proof is convincing.

3. For each of the following sentences, change the subject of the verb to the plural, and change the verb so that it agrees with its subject. For example:
      The hero was enthusiastically welcomed.
      The heroes were enthusiastically welcomed.

      The studio is used by many artists.
      The studios are used by many artists.

1. The radio is broadcasting news every hour.
2. The tomato was being baked.
3. The mosquito woke us up.
4. The soprano performed with the orchestra.
5. The solo was played by the violinist.
6. The archipelago lies off the coast of South America.
7. The silo is used for storing corn.
8. The potato has been boiled.
9. The volcano is not active.
10. The casino was open until one o'clock in the morning.
11. The innuendo should be ignored.
12. The ratio has been favorable.

4. For each of the following sentences, change the subject of the verb to the plural, and change the verb so that it agrees with its subject. For example:
      The hypothesis is still tentative.
      The hypotheses are still tentative.

      The nebula has been studied by many scientists.
      The nebulae have been studied by many scientists.

      The thesis will have been reviewed by experts.
      The theses will have been reviewed by experts.

1. The synopsis is accurate.
2. The phenomenon surprised us.
3. The stratum contains fossils.
4. The analysis was proved correct.
5. The crisis has caused concern.
6. The spectrum includes many different colors of light.
7. The axis of rotation will be investigated.
8. The stimulus has been found to be effective.
9. The criterion was used to judge which proposals should be accepted.
10. The oasis is visited by many travelers.
11. The honorarium is being presented today.
12. The parenthesis was omitted.

5. For each of the following sentences, change the subject of the verb to the plural, and change the verb so that it agrees with its subject. For example:
      The goose likes to eat daisies.
      The geese like to eat daisies.

      The ox was being led to the barn.
      The oxen were being led to the barn.

      The salmon has been caught by the bear.
      The salmon have been caught by the bear.

1. The child is happy.
2. The sheep has been sheared.
3. The man was being given directions.
4. The deer is eating the hay.
5. The woman has visited us.
6. The mouse makes a great deal of noise at night.
7. The gentleman would like to have breakfast early.
8. The louse is a nuisance.
9. Your foot is size ten.
10. The fisherman has had a good season.
11. The tooth needs to be filled.
12. The policewoman was directing traffic.

 

Chapter Twelve

1. Rewrite each of the following sentences, changing the subject of the verb to the singular, inserting a or an before the subject, as appropriate, and changing the verb to agree with the subject. For example:
      Violins are difficult to play.
      A violin is difficult to play.

      Unions have been formed.
      A union has been formed.

      Answers are always provided.
      An answer is always provided.

      Heirs have many friends.
      An heir has many friends.

1. Avocados are expensive.
2. Windows are an important feature of an artist's studio.
3. Umbrellas should not be used during a thunderstorm.
4. Horses can be useful in the mountains.
5. Cashews are a type of nut.
6. Onions can be used for flavoring soup.
7. Trucks have many uses.
8. Hours passed.
9. Sentences should have proper punctuation.
10. Escalators are very convenient.
11. Uniforms must be worn.
12. Boxes were found on the floor.
13. Marshes lie beyond the city boundary.
14. Ideas can be valuable.
15. Eggs are a good source of protein.

2. Fill in each blank with either the indefinite article (a or an) or the definite article (the). Use a or an with nouns referring to people or things which have not been mentioned previously, and use the with nouns referring to people or things which have been mentioned previously.

I had never visited Seretnay Park before. Last week I went to ____ park and chose ____ tour to take. There were twenty tourists and one guide. ____ guide asked what we wanted to see. I said I had never seen ____ eagle, and I would like to see one. ____ child on ____ tour said he would like to see ____ beaver, since he had heard there were many in ____ park. ____ guide said he would do his best. First he led us along ____ road, and then we turned off onto ____ path. To our right was ____ marshy pond.

Suddenly ____ child who had spoken before shouted, "Look! I see ____ beaver!" Of course ____ beaver was startled. It slapped its tail and disappeared into pond.

Our guide pointed to ____ pile of sticks and said, "That's where ____ beaver lives. That's his house." I had my camera with me, and took ____ photograph of ____ house.

As we were standing there, ____ guide was looking across ____ pond through ____ small telescope. After a minute, he tapped my shoulder and handed me ____ telescope. He pointed to ____ tall tree and said, "Do you see that white speck? That's ____ bald eagle."

I had difficulty focusing ____ telescope, but finally I saw ____ eagle. As I watched, ____ eagle spread its wings and soared over the water.

It was ____ wonderful experience for me to see some of the wild creatures that live in ____ park.

3. Fill in each blank with a, an or the. Be prepared to justify your choice. For example:
      ___ moon is full tonight.
      The moon is full tonight.

      He is ___ singer.
      He is a singer.

      Please sit in ___ center of the boat.
      Please sit in the center of the boat.

      The room costs twenty dollars ___ day.
      The room costs twenty dollars a day.

      ___ wheel is considered one of mankind's most important inventions.
      The wheel is considered one of mankind's most important inventions.

1. His aunt is ____ teacher.
2. ____ architect is trained in design, drafting, and economics.
3. ____ ostrich is the world's largest bird.
4. Buses pass this point two or three times ____ hour.
5. Plants gain energy from the light of ____ sun.
6. I woke up in ____ middle of the night.
7. She is ____ doctor.
8. ____ seal is an excellent swimmer.
9. Our eyes usually blink several times ____ minute.
10. At ____ equator, sunrise occurs at the same time each day.
11. He is ____ author.
12. They wanted to hear ____ end of the story.
13. Such a severe storm occurs only once ____ decade.
14. Mount Everest is tallest mountain in ____ world.
15. There is an index at ____ back of the book.