UNIT 15. COMPUTERS

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Exercise 1:
1. have already visited
2. has already read
3. have not begun
4. has been
5. have not started
6. has been
7. have gone
8. has already explained
9. have already taken
10. has not finished
Exercise 2:
1. called
2. met
3. have flown / went
4. When did your father give up smoking ?
5. moved
6. have been
7. spent
8. have watched
9. delivered
10. heard
11. have had / gave
12. has done
13. has turned
14. has just started
15. has lost
16. has gone
17. Have you bought the laptop yet?
18. worked
19. have not bought
20. Did they spend
Exercise 3:
1. A. access
2. D. concern
3. B. post
4. A. bought
5. D. wrong
Exercise 4:
6. C. has already gotten
7. B. have you known
8. A. do not know
9. D. to
10. B. Did you ever eat
11. A. off
12. A. Printer
13. C. leave
14. A. with
15. A. to start
16. A. already finished
17. A. has just gone
18. D. b & c
19. D.
20. C. Ann doesn't work here any more
21. A. turn off
22. B. not working
23. A. pen
24. B. entertaining
25. A. Campus
Exercise 5:
26. C. dusting => to dust
27. C. didn't see => haven't seen
28. A. There was => There is
29. C. restricted on => restricted to
30. A. had => did
Exercise 6:
31. D.
32. D. sometimes
33. B. Another
34. A. may
35. A. health
Exercise 7:
36. B. huge
37. D. all are correct
38. D. computers
39. D. computer's size
40. A. The first computers were very large

Exercise 1. Put the verbs in brackets in the present perfect tense.

1. I (already / visit) have already visited our form teacher in the hospital.

2. John (already / read) has already read the letter from Mary.

3. We (not begin) haven't begun to learn for the test yet.

4. Nancy (be) has been to Vietnam several times.

5. They (not start) haven't started the project yet.

6. The Greens (be) have been to many countries in the world so far.

7. We (go) have gone to that village to do volunteer work several times.

8. Our teacher (already / explain) has already explained to us how to use the printer.

9. My pen isn't here any more. Someone (already / take) has already taken it.

10. Mai (not finish) hasn't finished her homework yet.

Exercise 2. Put the verbs in brackets in the correct verb tense : the Present Perfect or Past Simple.

1. Tom (call) called his boss yesterday.

2. I (meet) met Robert at the supermarket this morning.

3. We (fly) have flew  to Ha Noi several times, but last summer we (go) went there by train.

4. When (your father / give up) did your father gine up smoking?

5. My uncle (move) moved to Da Lat in 2005.

6. I (be) have been to Sa Pa twice since 2000.

7. We (spend) spent our summer vacation in Ha Long Bay last July.

8. I (watch) have watched the film Titanic already.

9. The postman (deliver) delivered the letter half an hour ago.

10. I (hear) heard the good news from Mary a few minuters ago.

11. I (have) have had this iPad for three years. My father (give) has given it to me when I was in grade 6.

12. My mother (do) done all the cleaning. The apartment is really clean now.

13. Someone (turn) has turned on the hi-fi. Do you know that song?

14. The match (just start) has just stared . Our team is playing very well.

15. He (lose) has lost his credit card. He can't find it anywhere.

16. Prices (go) have gone up. Everything is more expensive nowadays.

17. (you / buy) Have you bought  the laptop yet.

18. Miss White (work) worked in Ha Noi from 2011 and 2014.

19. I can't take any pictures because I (not / buy) haven't bought a new film yet.

20. (they / spend)Did they spend their holiday in New Zealand last summer?

Exercise 3. Choose the word whose anderlined part is pronounced differently from that of the others.

1. A. access

2.  D. concern

3.  B. post

4. A. bought

5. D. wrong

Exercise 4. Choose the word or phrase that best completes each unfinished sentence below.

6. Tom ______ his flu shot, so he probably won't get the flu this year.
C. has already gotten

7. -'How long ______ Tom?' - 'Since we were kids.'
B. have you known

8. I have no idea where she is.

B. don't care about
9. The information was restricted ______ teachers.

B. of

10. ______ durian when you live in Malaysia?

B. Did you ever eat

11. Could you turn the oven ______ if you're going in the kitchen?

A. off

12. ______ is a machine that prints words from a computer.

A. Printer

13. They won't let him ______ the country.

C. leave

14. What's wrong ______ the engine? It's making an awful noise.

A. with

15. At first , she doesn't agree ______ early , but she changes her mind in the end.

D. with starting

16. Dr.Meier has ______ his interview , so he has left the TV.

A. already finished

17. Don't disturb Amy. She ______ to sleep.

A. has just gone

18. I'd like to visit Vietnam and Malaysia one day, ______ you.

D. b & c

19. I am not prepared to discuss ______ the matter any further.

A. about

20. Ann no longer works here.

C. Ann doesn't work here any more

21. Don't forget to ______ all the lights before you go to bed.

A. turn off

22. You can't watch the televison - it's Broken.

B. not working

23. I forgot bring a pen . Can you lend me _____ ?
B. one

24. The book is short but ______.

B. entertaining

25. _____ is the grounds and buildings of a university or college.

A. Campus

Exercise 5. Choose the underlined part that needs correcting.

26. C=> to dust

27. A => have known

28. A => There were

29. A => Studying

30. B => no idea

Exercise 6. Choose the word (a,b,c, or d) that best fits each of the blank speces.

Computers are very (31)_____ but they can also cause problems. One kind of problem is with the computer's memory. It is not perfect, so (32)_____ computers lose important information. (33)_____ problem is with the machinery. Computers are machines, and machines can break down. When computers break down, they (34)_____ erase information, like chalk on a blackboard. Or they may stop doing anything at all. And there is another different kind of problem with computers. Some doctors say they may be bad for your (35)_____ . They say you should computers all day.

31. D. a & c

32. A. nearly

33.  B. Another

34. A. may

35. A. health

Exercise 7. Read the following passage and choose the best answers to each of the question below.

The first computers were very large machines. Now computers come in all shapes and sizes. There were still big computers for companies or universities. There are other special computers for factories. There large computers tell the factory machines what to do. But there are also small personal computers to use at home or in an office. There are even computers in telephones, television sets, and cars. These computers have to be very small. They are so small you cannot even see all their parts.

36. The first computers were _______________.

B. huge

37. There are computers _______________.

D. all are correct

38. What does the word 'They' in line 5 refer to?

D. computers

39. What is the passage written about?

D. computers' sizes

40. Which of the following is true?

A. The first computers were very large.

Exercise 1
1)have already visit
2)has already read
3)have not begun
4)has been
5)haven't started
6)has been
7)have gone
8)has already
9)has already take
10)has finished

Exercise 2;
1)called
2)met
3)have flown/went
4)When your father give up smoking
5)moved
6)have been
7)spent
8)have watched
9)delivered
10)heard
11)have had/ has gave
12)has done
13)has turned
14)has just started
15)has lost
16)has gone
17)have you bought the laptop yet?
18)worker
19)have not bought
20)Did they spend.

Exercise 3;
1.A
2.D
3.B
4.A
5.D

Exercise 4;
6.C
7.B
8.A
9.D
10.B
11.A
12.A
13.C
14.A
15.A
16.A
17.A
18.D
19.D
20.C
21.A
22.B
23.A
24.B
25.A

Exercise 5;

26)=>to cluster
27)=>have seen
28)=>there is
29)=>restricted to
30)=>did
Exercise 6;
31)A
32)D
33)B
34)A
35)D

Exercise 7;
36)B
37)D
38)D
39)D
40)A

EXERCISE 1: RUT THE VERBS IN TRACKETS IN THE PRESENT PECTFECT TENSE
1.HAVE ALREADY VISITED
2.HAS ALREADY READED
3.HAVEN'T BEGUN
4.HAS BEEN
5.HAVEN'T STARTED
6.HAS BEEN
7.HAVE GONE
8.HAS ALREADY EXPLAINED
9.HAS ALREADY TAKEN
10.HASN'T FINISHED
EXERCISE 2: PUT THE VERBS IN BRUCKETS IN THE CORRECT VERBS TENSE: THE PRESENT PERFECT OR PAST SIMPLE
1.CALLED
2.MET
3.HAVE FLOWN/WENT
4.WHEN DID YOUR FATHER GIVE UP SMOKING ?
5.MOVED
6.HAVE BEEN
7.SPENT
8.HAVE WATCHING
9.DELIVERED
10.HEARED
11.HADVED HAD/HAS GIVEN
12.DONE
13.HAS TURNED
14 HAS JUST STARTED
15.NUSLOST
16.HAVE GONE
17.HAS YOU BOUGHT
18.WORKED
19.HAVEN'T BOUGHT
20.DID THEY SPEND
EXERCISE 3: CHOOSE THE WORLD WHOSE ANDERLINE PART IS PRONOUNCED DIFFERENLY FROM THAT OF THE ORTHERS
1.A
2.D
3.B
4.A
5.D
EXERCISE 4: CHOOSE THE WORLD OR PHRASE BELOW THAT BEST COMPLETES EACH UNFINISH SENTENCE
6.C
7.B
8.C
9.D
10.B
11.A
12.A
13.C
14.A
15.A
16.A
17.A
18.D
19.D
20.C
21.A
22.B
23.A
24.B
25.A
EXERCISE 5: CHOOSE THE INDERLINED PART THE NEED CORECTING
26.C(DUSTING ⇒TO DUST)
27.A(KNEWN ⇒HAVE KNOWN)
28.A(THERE WAS ⇒THERE WERE)
29.C(RESTRITED ON ⇒RESTRITED TO)
30.A(HAD ⇒HAS)
EXERCISE 6:CHOOSE THE WORLD(A,B,C,OR D) THAT BEST FITS EACH OF BLANK SPECSES
31.D
32.A
33.B
34.A
35.A
EXERCISE 7: READ THE FOLLOWING PASSAGE AND CHOOSE THE BEST ANSWER TO EACH OF THE PUESTION BELOW
36.B
37.D
38.D
39.D
40.A
THE END