1 . Look at his strong muscles now! He ________ worked out regularly over the past year.

A．could have

B．should have

C．might have

D．must have

3 . You haven’t gone anywhere today. You ________ your bag in the office.

A．could have left	B．must have left
C．could leave	D．must leave

4 . There was no sign of a break-in, so the thieves ________ someone on the inside helping them.

A．must have had	B．could have had
C．needn’t have had	D．might have

5 . Jenny _______ have kept her word. I wonder why she changed her mind.

A．must

B．should

C．need

D．would

6 . Jack____________ his homework, for he is playing football outside.

A．couldn’t have finished	B．must finish
C．must have finished	D．might have finished

7 . It rained a lot during their journey, so they________have had a good time.

A．can’t

B．must

C．shouldn’t

D．might

8 . —I expected him to be nervous before his speech, but he was as cool as a cucumber.
—He _______ it carefully.

A．could have prepared	B．shouldn’t have prepared
C．must have prepared	D．can’t have prepared

9 . 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