A. chance

    B. occasion

    C. event

    D. affair

    22. Please keep an eye on my luggage，and I'll be back ____.

    A. in time

    B. in no time

    C. at one time

    D. at a time

    23. Such a skilled tennis player knows how to take ____ of his opponent's （对手）chief weakness.

    A. use

    B. advantage

    C. utility

    D. chance

    24. It is impossible to live in society and be independent ____ society.

    A. on

    B. from

    C. in

    D. of

    25. She scarcely cares for anything，_____？

    A. doesn't she

    B. does she

    C. is she

    D. isn't she

    26. There is an old saying which goes，“Never ____ until tomorrow what you can do today. ”

    A. put aside

    B. put up

    C. put off

    D. put away

    27. His car broke down when he was only ____ home.

    A. a half way

    B. halfway

    C. half a way

    D. halfway to

    28. The patient's progress was very encouraging as he could ____ get out of bed without help.

    A. nearly

    B. only

    C. merely

    D. barely

    29. He has ____ the army for ten years and is now an officer.

    A. gone into

    B. joined in

    C. been in

    D.  into

    30. He has made another wonderful discovery，_____ of great importance to science.

    A. which I think it is

    B. of which I think it is

    C. I think which is

    D. which I think is

    参考答案：

    21—25 BBBDB 26—30 CBACD