Thank you for all your hard work last week. I don’t think we ____ it without you.   

A. can manage     B. could have managed  C. could manage       D. can have managed

After walking for ten minutes, she suddenly realized that she ____ in the wrong direction.

A. was walking   B. has been walking      C. had been walking     D. walked

____ she is not so healthy ____ she used to be?

A. How is it that; as       B. Why is it that; what   C. Is it why; that 　      D. How it is that; as

____ sales down by 30%, the company has to lay off many clerks.        　

A. For 　           B.  As 　　           C. Through 　          D. With

 At length, we found ourselves in a pleasant park with trees providing shade and ____ down to eat our picnic lunch.

A. sitting        B. sat                 C. to sit                 D. having sat

We hope that the measures to control the stock market, ____ are taken by the government, will work.

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

―Mr. Smith, I can’t go on with my reading.

―I’ve already told you the last three parts of the article ____ the most difficult to understand.

A. is                   B. are                C. had been             D. were

 Keep up a good state of mind even if you ____ fail plenty of times.

A. must                B. will                C. can                  D. should

Although he knew little about the large amount of work done in the field, he succeeded ____ other more well-informed experts failed.

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

People in Sichuan province are determined to rebuild ____ was destroyed in the earthquake.

A. that            B. which              C. how                  D. what