I don't know what role he ____ in the activity.

A. put                         B. made                             C. played                    D. used

She will tell us why she feels so strongly that each of us has a role ____ in making the earth a better place to live.

A. to have played B. to play C. to be played D. to be playing

She's ____ the Times Newspaper and is very satisfied with her work.

A. on                          B. for                         C. at                           D. in 

Some questions have ____ at the meeting. 

A. come out                       B. come up                 C. come in                  D. come on

Very few scientists ____ completely new answers to the world's problems.

A. come up with          B. come out                       C. come around           D. come up to

I advise you to take school more seriously, otherwise you'll have to go out and work ____.

A. as a result B. now and then C. in a word D. at that moment

He signed the paper ____ coffee.

A. for                         B. in                           C. over                       D. on 

I'm sorry I can't see you immediately; but if you'd like to take a seat, I'll be with you ____.

A. for a moment B. in a moment C. for the moment D. at the moment

I'm certain David's told yo9u his business troubles.  ____, it's no secret that he owes a lot of money to the bank.

A. However                 B. Anyway                  C. Therefore                      D. Though

The present regime (政体)has been in ____ for two years.

B.force B. power C. strength D. energy