71.　 夏天长时间暴露在阳光下是有害的。

It’s ____________ to be ____________ to the sun for a long time in summer.

35.　 _______ all my letters, I had a drink and went out for a walk.

A. Finished 　　　　　　　　　 B. Having finished C. Finishing 　　　　　　　　 D. To finish

34.　 Bob’s leg got hurt when _______ up Huangshan.

A. climbing 　　　　　　　　　 B. his climbing 　　　　　　 C. climbed 　　　　　　　　　 D. he climbed

33.　 Hundreds of people had to be _______ because the stadium was so full that couldn’t even admit one drop in.

A. looked into 　　　　　　　 B. picked up 　　　　　　　　 C. turned away 　　　　　　 D. sent for

32.　 It was over a decade _______ they paid off all their debt. You can imagine what a hard life they had.

A. before 　　　　　　　　　　　　　　 B. until 　　　　　　　　　　　 C. after 　　　　　　　　　　　 D. while