11. When his name was mentioned， I saw him _______ from his seat.

A. rise

B. rose

C. raise

D. raised

12. The salesman persuaded us ______ his product.

A. buying

B. to buy

C. buy

D. having bought

13. The city government must take action ______ the increasing population.

A. to control

B. controlling

C. controls

D. controlled

14. Many people do not understand how much water the human body needs ____work properly.

A. at

B. for

C. in

D. to

15. The tourists haven’t decided which hotel ______.

A. to stay

B. to stay at

C. is to stay

D. to be staying

16. They held a conference to decide ______ to meet the emergency.

A. how

B. what

C. that

D. which

17. Wet umbrellas are not allowed ______ into this hotel.

A. to be taken

B. to take

C. taken

D. taking

18. It’s very kind ______ invite me to your birthday party.

A. from you to

B. of you to

C. by you to

D. that you

19. I feel it an honor ______ to speak here.

A. to ask

B. to be asked

C. asking

D. having asked

20. Mr. Brown is said ______ for Italy last week.

A. to have left

B. to leave

C. to be leaving

D. to have been left