1 . You              park here! It’s an emergeney exit.

A．wouldn’t	B．needn’t
C．couldn’t	D．mustn’t

2 . --------May I take this book out of the reading room?
------No,you_________. You read it in here.

A．mightn’t

B．won’t

C．need’t

D．mustn’t

3 . —I want to know if I__________ smoke here.
—No, you _________.Could you see the sign “NO SMOKING” there?

A．can; needn’t

B．must; can’t

C．shall; won’t

D．may; mustn’t