1. If we (not stop) ____ cutting down so many trees, we will endanger our oxygen supply.

2. You (ever/ live)_____________________  in a smart house?

3. This Robot is designed to be able (open) ___________ the door, and reach for objects.

4. People (know)_______________ little about the Internet twenty years ago.

5. She (not write) _____________ to you if she leaves.

6. My brother (listen) ____________________ to music now.     

7. They (visit) ____________________Da Lat next week.

8. Long is thirsty. He’d like (drink) ____________________some water.

*Joining two sentences, using the words in brackets.
1.The climate is changing. The earth is getting warmer.(BECAUSE)
2.We should stop cutting down so many trees. We endanger our oxygen supply.(UNLESS)
3.People begin to recycle. They generate much less trash.(WHEN)
4.We are damaging the ozone layer. The ozone layer is necessary for human existence.(EVEN THOUNG)
5.Sue is suffering from skin cancer. She was exposed to radiation when she was young.(SO)

I/. Supply the correct forms of the verbs in the brackets:

1. This hotel (build) last year.                                ______________________

2. Where you (buy) this dictionary?                                 ______________________

3. Mr Peter (move) to Ho Chi Minh since 2008. ______________________

4. She said that she (have) an expensive car.      ______________________

5. My uncle is used to (drink) a cup of coffee in the morning.    ____________________

XI. Supply the correct verb forms.
1. I (see) a car accident while I (wait) for you on this corner yesterday.
2. Mr. john (be) principal of our school since last year.
3. Mr. Smith (teach) at this school since he (graduate) in 1980.
4. My father (not watch) TV every night.
5. I (meet) Authur three weeks ago.
6. Yesterday the police (report) that they (capture) the thief.
7. My friend (thank) me for what I had done for him.
8. Someone (steal) my handbag on the bus.
9. The Browns (live) in Paris for 7 years when the second World War (break) down.
10. Last month I (be) in the hospital for ten days.
11. Don't call me in the afternoon. I usually (be) away in the afternoon.
12. Mr. Clark (be) in New York 2 months ago. Mr. Rossi (be) in New York until  2 months ago.
13. John (drive) that car ever since I (know) him.
14. People (speak) English in most of Canada.
15. The dog (wag) his tail whenever he (see) me.
16. What you (do) when I (ring) you last night?
17. Up to then I never (see) such a fat man.
18. I (not see) him last Monday.
19. They had sold all the books when we (get) there.
20. I think he (leave) as soon as he (know) the news.
21. She (play) the piano when our guests (arrive) last night.
22. He (come) and (see) you soon.
23. I (come) as soon as I have finished my work. You (be) ready?
24. My mother (come) to stay with us next weekend.
25. Where you (spend) your holidays next summer?
26. Violets (bloom) in spring.
27. We (not live) in England for two years now.
28. I (never forget) what you (just tell) me.
29. They (prepare) the Christmas dinner at the moment.
30. When I last (stay) in Cairo, I (ride) to the Pyramids on a camel that my friend (borrow) the day before.
31. Our teacher (tell) us yesterday that he (visit) England in 1970.
32. George (work) at a university so far.
33. When he lived in Manchester, he (work) in a bank.
34. Birds (build) their nests in summer and (fly) to the South in winter.
35. I (lose) my key. (Can) you help me look for it?
36. My father (not smoke) for 5 years.
37. My teacher wasn't at home when I (arrive). He (just go) out.
38. How long Bob and Mary (be) married?
39. You (receive) any letter from your parents yet?
40. My brother (join) the army when he (be) young.
41. You (remember) my name or you (forget) it someday?
42. Tom (study) chemistry for three years and then he gave it up.
43. Miss Lee often (write) when she was on holiday.
44. He (leave) home two weeks ago and we (not hear) from him since then.
45. You (speak) to Mrs. Baker yesterday?    
No, I (not see) her for a long time. I (not can) remember when I last (see) her.
46. When the teacher came in, the pupils (play) game.
47. Columbus (discover) America more than 400 years ago.
48. By next month, I (finish) my first novel.
49. By May 5, we (live) in this city for ten years.
50. When your father (die)? I (not kow) when he (die).
51. Bill said he (forget) to buy a dictionary.
52. He felt asleep while he (do) his homework.
53. We (not see) them for a long time.
54. It (rain) when we arrived.
55. Kite and I (wait) right here until you get back.
56. He'll leave as soon as he (hear) the news.
57. Dick (start) school before he was  seven.
58. How long you (study) in this school?
59. We (not receive) any letter from him since he (leave) four months ago.
60. Where are you? I'm upstairs. I (have) a bath.
61. I (speak) to you about that matter after the meeting tonight.
62. At this time next week, we (live) in USA.
63. Hurry up! The train (come).
64. Be quiet! The teacher (be) angry.
65. Why didn't you listen while I (speak) to you?
66. Some animals (not eat) during winter.
67. I (finish) the book before my next birthday......
68. John (watch) TV at 8 last evening.
69. Mr. Pike (live) here since last October.
71. The house (build) two years ago......
72. Listen! The bird (sing).
73. Trees (plant) since it (stop) raining.
74. Tom Baker (not come) here tomorrow.
75. By the end of last March, I (study) English for 5 years.
76. He often (say) O.K when he (talk) with the guests.
77. What you (do) after you (go) home yesterday?
78. How long you (wait) for me? Just a few minutes.
79. He (do) his homework before he went to the cinema..
80. By noon, I (wait) for her for two hours.
81. By the time you come there, she (make) a big cake.
82. Yesterday thieves (break) into the house and (steal) a lot of fur coats while the guests (dance).
83. When I came in, they all (sit) round a fire. Mr. Pike (do) a crossword puzzle, Mrs. Pike (knit), and the others (read).
84. Mr. Jackson (paint) his house since last month.
85. She (ask) me to tell about him several times.
86. The audience (listen) to everything he said last night.
87. At 4 p.m yesterday? Well, I (work) in my office at that time.
88. A: I (play) football when I was 5 years old. .................................................................................
      B: You (play) since you (come) to England? ...............................................................................
      A: Oh, yes. I (play) quite a lot. I (join) a club the day after I (arrive). ........................................
89. I'm preparing to support anything he (say) tomorrow.
90. Sometimes I (get) up before the Sun (rise).
91. He said he (be) mistaken.
92. Don't speak until someone (ask) you.
93. Mary (come) from London.
94. Please be quiet! I (work).
95. When I (be) a child, I (want) to be a doctor.
96. David (be) born after his father (die).
97. Long ago, my younger brother often (cry).
98. I (not send) the parcel until I hear from you.
99. The last train (leave) the station at 5 p.m..
100. Up to now, the teacher (give) our class five tests

Supply the correct verb forms.1. I (see) a car accident while I (wait) for you on this corner yesterday.2. Mr Jone (be) principal of our school since last year.3. Mr Smith (teach) at this school since he (graduate) in 1980.

4. My father (not watch) TV every night.5. I (meet) Arthur three weeks ago.6. Yesterday the police (report) that they (capture) the thief.7. My friend (thank) me for what I had done for him.8. Someone (steal) my handbag on the bus.9. The Browns (live) in Paris for 7 years when the second World War (break) out.10. Last month I (be) in the hospital for ten days.11. Don’t call me in the afternoon. I usually (be) away in the afternoon.12. Mr Clark (be) in New York 2 months ago. Mr Rossi (be) in New York until 2 months ago.13. John (drive) that car ever since I (know) him.14. People (speak) English in most of Canada.15. The dog (wag) his tail whenever he (see) me.16. What you (do) when I (ring) you last night?17. Up to then I never (see) such a fat man.18. I (not see) him since last Monday.19. They had sold all the books when we (get) there.20. I think he (leave) as soon as he (know) the news.21. She (play) the piano when our guests (arrive) last night.22. He (come) and (see) you soon.23. I (come) as soon as I have finished my work. You (be) ready?24. My mother (come) to stay with us next weekend.25. Where you (spend) your holidays next summer?26. Violets (bloom) in spring.27. We (not live) in England for two years now.28. I (never forget) what you (just tell) me.29. They (prepare) the Christmas dinner at the moment.30. When I last (stay) in Cairo, I (ride) to the Pyramids on a camel that my friend (borrow) the daybefore.31. Our teacher (tell) us yesterday that he (visit) England in 1970.

32. George (work) at the university so far.33. When he lived in Manchester, he (work) in a bank.34. Birds (build) their nests in summer and (fly) to the South in winter.35.1 (lose) my key. (can) you help me look for it?36. My father (not smoke) for 5 years.37. My teacher wasn’t at home when I (arrive). He (just go) out.38. How long Bob and Mary (be) married?39. You (receive) any letter from your parents yet?40. My brother (join) the army when he (be) young.41. You (remember) my name or you (forget) it someday?42. Tom (study) chemistry for three years and then he gave it up.43. Miss Lee often (write) when she was on holiday.44. He (leave) home two weeks ago and we (not hear) from him since then.

XI. Joining two sentences, using the words in brackets.
1. We must conserve water. Otherwise we will face serious water shortages. (IF)
________________________________________________________________
2. The weather was awful. We didn’t enjoy our camping holiday. (BECAUSE OF)
________________________________________________________________
3. Plastic bags are non-biodegradable. They will remain in the environment for many years.
(SINCE)
________________________________________________________________
4. Paul doesn’t think about the planet. He wastes so much water. (IF)
________________________________________________________________
5. Water pollution happens. Many aquatic animals such as fish can die. (LEAD)
________________________________________________________________
6. The climate is changing. The earth is getting warmer. (BECAUSE)
________________________________________________________________
7. We should stop cutting down so many trees. We endanger our oxygen supply. (UNLESS)
________________________________________________________________
8. People begin to recycle. They generate much less trash. (WHEN)
________________________________________________________________
9. We are damaging the ozone layer. The ozone layer is necessary for human existence.
(EVEN THOUGH)
________________________________________________________________
10. Sue is suffering from skin cancer. She was exposed to radiation when she was young. (SO)
________________________________________________________________

IV/ Supply the correct tense or form of the verbs in brackets.

1. This time last year, we (study) at a university in Hanoi.

2. The girl (sit) next to me is very clever.

3. When I got to the bus stop, the bus just ( leave).

4. By the time I recovered from the shock he (disappear) round the corner.

5. She (have) a headache for several hours.

6. I (watch) a movie when you called me last night.

7. I’m really looking forward to (take) a vacation.

8. I’m hungry because I ( have ) breakfast or lunch yet.

9. By the time I got to Lan’s house, she ( already / leave) for work.

10. We would rather (go) to the movies tonight.

11. He told me that he ( attend) our wedding tomorrow.

12. The heavy rain kept us from (go) to class on time.

13. You ever ( be) to England? – Yes, I ( go) there 3 years ago.

14. It is dfficult to get used to (eat) with chop stick.

15. The chairman suggested (hold) another next week.

16. Would you mind ( lend) me £ 5.1, I forgot (cash) a cheque?

17. Peter used (go) to the zoo when he was a child.