John and I _____ friends for eight years. We first got to know each other at a Christmas party. But we _____ each other a couple of times before that.

A. had been； have met                        B. have been； have met

C. had been； had met                   D. have been； had met

—I’m sorry to keep you waiting.

—Oh, not at all. I _____ here only a few minutes.

A. am          B. was                  C. have been       D. will be

My brother _____ the Youth League since 1990.

A. joined       B. has been in            C. has joined   D. had joined

What _____ you _____ tomorrow morning?

A. are/going to do B. are/doing        C. are/done      D. have/done

Had you listened to the doctor, you _____ all right now. 

A. are              B. were               C. would be         D. would have been 

He treated me as though/as if _____ his own son.

A. I am             B. I would be            C. I was          D. I were

 The book I borrowed from the library isn’t here. Who __________?

A. could have taken it                      B. must have taken it

C. might take it                            D. should take it.

 —Would you come and join us?  

　—I wish I _____. I am busy at the moment.  

A. can 　　         B. could 　　     C. would 　      　D. should  

 He _____ finished earlier.  

A. shall have 　　B. ought to 　　 C. could have 　D. must have  

Not until all the milu deer _______ did we realize that we should build a natural park to protect them.

  A. died out        B. died of        C. died from       D. died away