`IV`.

1. T (Actually, the world’s energy resources are limited (adj): giới hạn)

2. T (However, we also should use them economically [...])

3. F (dẫn chứng của câu 1)

4. T (According to Professor Marvin Burnharm [...] and nuclear power is the only alternative (adj): thay thế)

`V`.

1. C 

- A. Keep s.one adj

- B. environment thiếu mạo từ the

- D. Thiếu "very"

2. B (far - farther/further - farthest/furthest)

3. D (had better (not) do s.th: tốt hơn (không) nên làm gì; food là danh từ không đếm được nên ta dùng "much")

4. C (enjoy doing s.th: thích làm gì; enjoy là động từ và chủ ngữ là I nên ta dùng TĐT do)

5. C (find s.th/doing s.th adj: cảm thấy cái gì/làm gì như thế nào; dùng TTSH cho thích hợp)

6. A (So sánh bằng: S1 + tobe + as + (not) + adj + as + pronoun + (V)

7. B (so far: HTHT; encourage (s.one) to do s.th: khuyến khích (ai) làm gì)

8. B (tobe + adj: miêu tả; think s.th/doing s.th + tobe + adj: nghĩ cái gì/làm gì ntn; he là chủ ngữ số ít nên V thêm -s/-es)

9. A (ask s.one (not) to do s.th: hỏi ai (không) để làm; donate s.th for s.one: nguyên góp gì cho ai)

10. A (future là danh từ nên trước đó phải có mạo từ "the"; it là chủ ngữ số ít nên V ta thêm -s/-es)

Ex4. Read the following passage and decide if it is T or F.
 Many people still believe that natural resources will never be used up. Actually, the world’s energy resources are limited. Nobody knows exactly how much fuel is left. However, we also should use them economically and try to find out alternative sources of power. According to Professor Marvin Burnharm of the New England Institude of Technology, we have to start conserving coal, oil and gas before it is too late; and nuclear power is the only alternative. However, many people do not approve of using nuclear power because it’s very dangerous. What would happen if there was a serious nuclear accident? Radioactivity causes cancer and may badly affect the future generations. The most effective thing is that we should use natural resources as economical as possible.
1. Natural resources will run out.                       A. True    B. False
2. We should use fuel economically.                  A. True    B. False
3. The world’s energy resources are unlimited.  A. True    B. False ( the world’s energy resources are limited. ) 
4. According to Professor Marvin Burnham, nuclear power will be used as a substitute for natural resources.                                                          A. True     B. False
.  Choose the correct sentence among (A, B, C or D) that uses the words given.
1. Keep/ environment/ clean / very important.
A. Keeping environment is clean and very important.   
B. Keeping environment clean is very important.
C. Keeping the environment clean is very important.    
D. Keeping the environment clean is important.
2. The town/ far/ than /we thought.
A.The town is farer than we thought.                        B. The town is farther than we thought.
C. The town is farthest than we thought.                    D. The town is far than we thought.
3. We / better / eat / too / fatty food / because / it / not good /  our health.
A.We had better eat too many fatty food because it is not good for our health.
B. We had better not eat too many fatty food because it is not good for our health.
C. We had better eat too much fatty food because it is not good for our health.
D. We had better not eat too much fatty food because it is not good for our health.
4. My friend/enjoy/visit/art gallery/I/too.
A. My friend enjoy visiting art gallery and I am, too.
B. My friend enjoys visiting art gallery and I am, too.
C. My friend enjoys visiting art gallery and I do, too.
D. My friend enjoys to visit art gallery and I do, too.
5. I/ find/play/ soccer/ useful / because/ /I/ can/improve/ health.
A. I find playing soccer useful because I can improve our health.
B. I find playing soccer is useful because I can improve our health.
C. I find playing soccer useful because I can improve my health.
D. I find playing soccer is useful because I can improve my health.
6. This camera/ not/ expensive/ as/I /thought first.
A. This camera is not as expensive as I thought first.
B. This camera is not expensive as I thought first.
C. This camera is not as expensive than I thought first.
D. This camera is as expensive as I thought first.
7. Big Heart organization /  encouraged / people / protect / environment/ so far.
A. Big Heart organization encouraged people to protect the environment so far.
B. Big Heart organization has encouraged people to protect the environment so far.
C. Big Heart organization encourages people to protect the environment so far.
D. Big Heart organization has encouraged people protect the environment so far.
8. My brother/ not like/ ice-skate/ because/ think/ it/ dangerous.
A. My brother does not like ice-skating because he think it is dangerous.
B. My brother does not like ice-skating because he thinks it is dangerous.
C. My brother does not like ice-skate because he think it is dangerous.
D. My brother does not like ice-skating because he think it dangerous.
9. We/ already/ ask/ people/ donate/ books / clothes / children.
A.We have already asked people to donate books and clothes for children.
B. We have already asked people to donate books and clothes to children.
C. We have already askes people to donate books and clothes for children.
D. We have already asked people donate books and clothes for children.
10. I / continue / my hobby / future / because / it / help/ save / environment.
A. I will continue my hobby in the future because it helps save the environment.
B. I will continue my hobby in future because it helps save the environment.
C. I will continue my hobby in the future because it help save the environment.
D. I will continue my hobby in future because it help save the environment.