II,单项填空（共15小题；每小题1.分，满分15分）
21. I don’t think the experiment is _________ failure. At least we have gained _________experience for future success.
A. /; the B. a; the C. a ; / D./ ; /
22. More and more high-rise buildings have been built in big cities __________ space.
A. in search of B. in place of
C. for lack of D. for fear of
23. _________with enough ability for the present job， Mike was not fit for it and he had to quit it.
A. Not equipping B. Not equipped
C. Not to be equipped D. Having not been equipped
24. There is somebody waiting for you, _________ I think might be one of your classmates.
A. who B. whom C. which D. whoever
25. The chemistry teacher demanded that the laboratory report _________ immediately after the experiment was done.
A. to be written B. would be written
C. be written D. must be written
