1 . —Must I go to the law university to be a lawyer like you, Dad?
—No, you ________, son. You’re free to make your own decision.

A．can’t

B．mustn’t

C．shouldn’t

D．needn’t

2 . ——You didn’t wait for Mr. Black last night, did you?
——No, but we ____. He didn’t return home at all.

A．couldn’t have	B．needn’t have
C．didn’ t need to	D．should wait have