1 . Tina ________ have known the truth, or she would have told us.

A．mustn't

B．needn't

C．shouldn't

D．can't

2 . Why didn’t you tell me there was no meeting today? I__________all the way here________the heavy snow.

A．needn’t have driven; through	B．didn’t need to drive; through
C．mustn’t have driven; through	D．couldn’t have driven; through

3 . — Do you know where David is? I couldn’t find him anywhere.
— Well. He ____ have gone far — his coat’s still here.

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

4 . —Is the letter from your mother?
—Yes.But she ________the letter herself，because she doesn’t even know one word.

A．needn’t have written	B．can’t have written
C．might not have written	D．should not have written