1 . Johnny, you ________ play with the knife, you ________ hurt yourself.

A．won’t; can’t

B．shouldn’t; must

C．mustn’t; may

D．can’t, wouldn’t

2 . —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