1 . 28．You ______ very fast if you went from New York to Boston in six hours．

A．should drive	B．would have driven
C．may drive	D．must have driven

2 . I told your friend how to get to the hotel,but perhaps I___have driven her there.

A．could	B．must
C．might	D．should

3 . The teacher_____have thought Johnson was worth it or she wouldn’t have wasted time on him, I suppose.

A．should	B．can
C．would	D．must