You can’t imagine what great trouble they have _____ the problem _____.

  　A. to solve; being talked about   

    B. solving; discussing

  　C. to solve; to talk about   

    D. solving; being discussed

You won’t know whether the coat fits you until you ______ it on.

  　A. will try                 B. have tried   

    C. tried                     D. are trying

I know Mr. Brown; we ______ to each other at an international conference.

    A. are introduced             B. are been introduced

    C. were introduced           D. had been introduced

--- I ______ so busily recently that I ______ no time to help you with your math.

   --- That’s OK. I can manage it by myself.

　 A. have been working; have

   B. have worked; had

   C. am working; will have

   D. had been working; had had

After several weeks, I have ____ myself ____ the life of Senior High School.

    A. got, used to            B. adopted, to                         C.  adjusted, to          D. applied, to

The finance minister has not been so _____ since he raised taxes to such a high level.

A. popular    B. well-known    C. favorable    D. preferable

Lawyers often make higher _____ for their work than they should.

A. bills    B. charges    C. prices    D. costs

In the ____ of proof , the police could not take action against the man .

 A．lack  B．shortage  C．absence  D．failure

We won't know whether it will be successful. We won't know whether there will be good _____.

A. ends    B. results    C. effects    D. causes

The director had her assistant ________ some hot dogs for the meeting．

　　A．picked up　 　　　　　　B．picks up

　　C．pick up　　　　　　　　 D．picking up