1. B -> to which

2. A -> intelligent enough

3. B -> with whom

4. B -> to be killed

5. B -> written

6. C -> to be helped

7. Researchers

8. successfully

9. dangerous

10. satisfaction

11. destructive

12. Her father whom she looked after for over twenty years died last year.

13. The students coming to class late missed the quiz.

14. My sister was the youngest player to win the gold medal last year

15. These books which you can get at any bookshop will give you all the information you need.

Find out the mistake in each sentence.
1. The song(A) to that(B) we listened(C) last night was(D) interesting.

=> to which ( đổi giới từ lên trc thì không dùng that)
2. George is enough intelligent(A) to pass(B) this(C) economics(D) class without help.

=> intelligent enough

3. The(A) woman with her(B) he fell in love(C) left him after a few(D) weeks.

=> with whom 

4. He is the second(A) person be killed(B) in(C) that way(D).

=> to be killed ( có số thứ tự : the first, the second...=> dùng to V)

5. (A) In an essay (B) writing in 1779, Judith Sargeant Murray promoted (C) the cause of (D) women's education.

=> written ( rút gọn mệnh đề quan hệ dạng bị động)

6. He is the (A) second person (B) be helped (C) in (D) that way.=>to be helped (giải thích như câu 4)
Give the correct form of the words in brackets.
7: _____Researchers______ all over the world are trying to find new sources of energy. (RESEARCH)
8: The operation had been ____successfully_______ performed ( adv+ v) and Dave wasn’t making a good recovery. (SUCCESS)  
9. Lists of ______dangerous______species (adj+ N) have been made by the scientists. (DANGER)
10: She didn't want to give him the _____satisfaction______ of seeing her cry. (SATISFY)
11: One should never underestimate the ____destructive_______ power of nuclear weapons. (DESTROY)
Rewrite the following sentences using the suggestions.
12. Her father died last year. She looked after him for over twenty years. (sử dụng đại từ quan hệ)
=>.........her father whom she looked after for over 20 years died last year...................................
13. The students missed the quiz. They came to class late. (rút gọn)
=>............the student coming to class late missed the quiz................................
14. My sister was the youngest player who won the gold medal last year. (rút gọn)
=>..........my sister was the youngest player to win the gold medal last year..................................
15. These books will give you all the information you need. You can get them at any bookshop. (sử dụng đại từ quan hệ)
=>...............these books which you can get at any bookshop will gove you all the information you need............................