1 . —What happened to the young trees we planted last week?
—The trees ____ well, but I ____ them．

A．might grow; hadn’t watered	B．needn’t have grown; didn’t water
C．would have grown; didn’t water	D．would grow; hadn’t watered

2 . What a pity! Considering his ability and experience, he ___________ it better.

A．need have done	B．must have done
C．can have done	D．might have done

3 . It was strange that you ______ for Maggie’s address. I just got a letter from her---the first one since her family moved on August 31, 1999.

A．should have asked	B．would have asked
C．shall ask	D．might ask

4 . —Did Ann fail in English?
—She ________. Don't you notice that she looks depressed?

A．might	B．must
C．may have	D．could have

5 . ––I didn’t go to work yesterday because my car broke down.
––You _____ mine. I wasn’t using it then.

A．might borrow

B．should borrow

C．must have borrowed

D．could have borrowed

6 . Some women 　　　　a good salary in a job instead of staying home， but they decided not to work for the sake of the family．

A．must make

B．should have made

C．would make

D．could have made