It was clear that the small grocer was _____ people he owed money to.

　　A. at the expense of     B. at the risk of

　　C. in the way of         D. at the mercy of

Mary had taken _____ to see that her guests had everything that they could possibly want.

　　A. efforts    B. pains    C. attempts    D. endeavors

The farmers were more anxious for rain than the people in the city because they had more _____.

　　A. at length    B. at last    C. at stake    D. at ease

It was necessary to _____ the factory building as the company was doing more and more business.

　　A. extend    B. increase    C. lengthen    D. magnify

With sufficient scientific information a manned trip to Mars should be _____.

　　A. obtainable B. potential C. considerable D. feasible

Once out of the earth’s gravity, the astronaut is        by the problem of weightlessness.

A. affected                 B. effected               

     C. related                 D. offered

Jack was sure to get this year's scholarship as the standards of scholarship were not terribly________

A. tough    B. rough    C. difficult    D. demanding

-Your plan is well designed. --Thank you. But I think it is far from ____.

A. perfect   B. perfectly   C. perfection  D. to be perfect

The railway will be opened______traffic＿＿＿ May 1, 2009.

A. to； on    B. to； in    C. by； on   D. for； on

"She's not a dancing teacher, is she?" "________."

A. Yes, and she isn'  B. Yes, but she was

C. No, but she isn't   D. No, but she was