20. --- _________makes Tom so excited?

　 ---Winning the first prize in singing, I think.

　 A. Why is it that　 B. Why it is that　 　C. What is it that　 D. What it is that

19. Only when I left my parents for Italy _______ how much I loved them.

　 A. I realized　 B. I had realized　 C. had I realized　 D. did I realize

18. I would appreciate it if you could keep me ______ of how our business is going on.

　 A. informed　 B. informing　 C. inform　　 D. to inform

17. Despite all the efforts that the local governments _______ over the years, many people there still live a poor life.

　 A. is to make　 B. to make　　 C. making　　 D. has made

16. I can’t stand _______ with Jane in the same office. She just refuses ______talking while she works.

A.　　　　　 working, stopping　 B. to work, stopping　 C. working, to stop D. to work, to stop

15. It took ______ building supplies to build these energy-houses . It took brains too.

A. more than　　 B. other than　　 C. rather than　 D. less than

14. It is helpful to put children in a situation ______they can see themselves differently.

　 A. that 　　　B. when 　　C. which　　 D. where

13. If it is quite _____ to you. I’ll visit you next Tuesday.

A.　　　　　 convenient　 B. fair　 C. easy　 D. comfortable