Nelson Mandela played and is still playing a leading ________ in ending apartheid(种族隔离政策) in South Africa.

A. use　　　 B. roles　　　　 C. role　　　　 D. parts

Only under special circumstances ______ to take make-up tests．

A．are freshmen permitted　　 　　　　　　 B．permitted are freshmen

C．freshmen are permitted　　 　　　　　　 D．are permitted freshmen

The glass doors have taken the place of the wooden ones at the entrance, __ in the natural light during the day.　 A. to let　 b. letting　 c. let　 d. having let

It’s well-known that smoking is h　　　　　 (有害的) to health.

Xie Jim was a famous director when lie was young. He _________a lot of films.

— Why didn't you tell Tom the truth?

— ____.

A. Yes, I was afraid to be scolded by him　　 　 B. No, but I wanted to

C. But I did　　　　　　　　　　　　　　　 D. I always hate telling lies

A British man who ____ to play practical jokes ____ his own humorous art work in four major New York museums over the last two weeks.

A、liked; has secretly hung B、likes; has secretly hung

C、had liked; secretly hung D、has liked; secretly hung

Now that we’ve discussed out problem, are people happy with the decisions　 　　　　?

A. taking　 　　　　 B. take 　　　　 C. taken　　　　 D. to take

We have various summer camps for your holidays, you can choose ____ based on your own interests.

A. either　　 B. each　　 C. one　　 D. it

I could have done better if I ______ more time．
　　A．have had　　 B．had　　　 C．had had　　 D．will have had