1 . --- Difficulties always go with me!
--- Cheer up! If God closes door in front of you, there be a window opened for you.

A．must	B．would
C．could	D．can

2 . —What        it be?
—It        be a man, for it is not moving. It        be a dustbin, I think.

A．can; may; must	B．can; can’t; must
C．can; must; can	D．may; may not; could

3 . -----Someone is knocking at the door.It ____ be Tom .
-----No, it ______ be him ;he has gone to Sydney.

A．must, can’t	B．might, mustn’t
C．may, needn’t	D．can, mustn’t

4 . Now that the sign reads, “No person ______ smoke here”, please choose a seat in the smoking area over there if you _______ smoke.

A．must; shall

B．will; must

C．shall; must

D．can; should