1 . You ________ in person; a telephone would have been enough.

A．couldn't have come	B．needn't have come
C．shouldn't have come	D．mustn't have come

2 . We        the difficulty together, but why didn’t you tell me?

A．should face	B．might face
C．could have face	D．must have faced

3 . My sister met him at Ningbo Grand Theatre yesterday afternoon, so he         your lecture.

A．couldn’t attend	B．mustn’t have attended
C．shouldn’t attend	D．couldn’t have attended

4 . You have a big mouth, Tom. You        have told everybody the secret.

A．can’t	B．mustn’t
C．shouldn’t	D．mightn’t

5 . ----- Mary looks very upset. She _______ failed to pass the exam.
----- I guess so. It's very difficult after all.

A．must have

B．could have

C．should have

D．might have

6 . I didn’t hear the phone．I ______ asleep．

A．can be

B．must have been

C．must be

D．should have been