I am very busy.I have a very difficult problem ______ .

   A.to work                             B.to work out      

   C.to be worked out                    D.to work it out

The missing boys were last seen ______ near the river.

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

I think the doctor is able to care of _____ is the matter with your son.

A. all                                B. what                     C. whatever              D. anything

He told me the news_____, believe it or not, he had earned $1 000 in a single day.?

A. that                             B. which?                 C. as                        D. because??

--- She’s not a dancing teacher, is she?

--- _____. ?

A. Yes, and she isn’t         B. Yes, but she was?    C. No, but she isn’t       D. No, but she was

The judge paid no attention to _____ he had just lost his wife.?

A. that　                           B. which　                 C. what　                          D. the fact that??

He was sentenced to death ______ what he has stolen from the bank.

A. that                             B. since                      C. because                        D. because of

The person we talked about ____ our school last week．

A. visiting                         B. will visit               C. visited                          D. has visited

Give me one more minute ____ I'll have finished.         

A. so                B. until           C. and            D. when

____production up by 60%, the company has had another excellent year.

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