A. to be sent B. sit C. seated D. sat

10. The message is very important, so it is supposed _____ as soon as possible.

A. to be sent B. to sent C. being sent D. sending

11. _____ around the Water Cube, we were then taken to see the Bird's Nest for the 2008 Olympic Games.

A. Having shown B. To be shown

C. Having been shown D. To show

12. _____ to reach them on the phone, we sent an e-main instead.

A. Fail B. Failed C. To fail D. Having failed

13. --- They are quiet, are n't they?

--- Yes. They are accustomed____ at meals.

A. to talk B. to not talk C. to talking D. to not talking

14. To learn English well, we should find opportunities to hear English ______ as much as we can.

A. speak B. speaking C.spoken D.to speak

15. ______ their hats into the air, the fans of the winning team let out loud shouts of victory.

A. To show B. Thown C. Throwing D. Being thrown

16. We had an anxious couple of weeks_____ for the results of the experiment.

A. wait B. to be waiting C. waited D. waiting