7. Can you tell me how long dinosaurs 　　　　on the earth before they　　 ?

A. had existed; disappeared

B. had existed; were disappeared

C. have existed; disappeared

D. have existed; were disappeared

6. They promise that they will finish the project in a month, but I remain 　　　about their claim.

A. optimistic　　 B. concerned

C. mysterious　　 D. sceptical

5. A sociologist made a speech at the meeting 　　　　the fact 　　　stay-at-home children have aroused the public concern widely.

A. threw light on; that

B. throwing light on; that

C. to throw light on; which

D. throwing light on; which

4. -Has Tim started? He said he would join in the party.

-He　　　 　. He is a man of keeping his word.

A. could have left

B. must have left

C. can’t come

D. won’t be coming

3. The article attacked the government 　　its policy education.

A. on; for　　　 B. for; on

C. with; of　　 D. of; with

2. In order to keep pace with times, we must 　　　the rapidly changing society.

A. stick to　　　 B. devote to

C. react to　　　 D. adapt to

从每小题的A、B、C、D四个选项中,选出可以填入空白处的最佳选项。

1. The suspect claimed 　　　　　TV with his family when the house caught fire.

A. watching　　　　 B. to be watching

C. having watched　 D. to have watched

5. 他开会时总是开门见山，简洁明了，这一点很受我们的欢迎。(come straight to the point)

4. 你怀疑他对你的感情，这是不公平的。(be sceptical about)

3. 士兵们被训练得能够适应各种艰苦的环境。(adapt to)