【题目】In our city the street lights turn on .

A. at the night

B. at the dusk

C. at dusk

D. at midnight

【题目】

Gun control is a subject ________ Americans have argued for a long time. (2009 .陕西)

A. of which

B. with which

C. about which

D. into which

【题目】Slowly the snake itself down after having drugs.

A. settled

B. settling

C. to be settled

D. to settle

【题目】Scientists study human brains work to make computers.

A. when

B. how

C. that

D. whether

【题目】Oh, I’m not feeling well in the stomach, I ________so much fried chicken just now.

A. shouldn’t eat

B. mustn’t have eaten

C. shouldn’t have eaten

D. mustn’t eat

【题目】

More and more rich people have promised to ________their wealth after death to help the poor and the disabled.（2013．河北衡水中学）

A. give away

B. give up

C. give out

D. give in

【题目】His writing is so confusing that it’s difficult to make out it is he is trying to express.

A. that

B. how

C. who

D. what

【题目】Please ________the numbers and I’m sure they will more than 1 000.

A. add; add up

B. add up; add up

C. add up; add up to

D. add; add up

【题目】

________ in the queue for half an hour, Tom suddenly realized that he had left his wallet at home.

A. To wait

B. Have waited

C. Having waited

D. To have waited

【题目】

They must have been enjoying themselves there, otherwise they ________so long.

A. can’t have stayed

B. wouldn’t have stayed

C. needn’t have stayed

D. couldn ’t stay