1 . Who ________ a lady like Susan Boyle, once an ordinary woman in Scotland, would achieve overnight success at Britain’s Got Talent Show?

A．might think	B．could think
C．could have thought	D．must have thought

2 . Smiles around the world _____ be false, ______ other feelings like anger, fear or worry.

A．must; hide

B．must; hiding

C．can; hide

D．can; hiding

3 . —I heard they went skiing in the mountains last winter.
—It ______ true because there was little snow there.

A．may not be

B．won’t be

C．couldn’t be

D．will be

4 . Mr. Bush is on time for everything. How ____ it be that he was late for the opening ceremony ?

A．can

B．should

C．may

D．must

5 . Helen________ go on the trip with us, but she isn’t quite sure yet.

A．shall

B．may

C．must

D．can

6 . 24. —Who______ it be that is knocking at the door?   
—It ______ be father, but I’m not sure.

A．can; must

B．can; may

C．must; can

D．may; must

7 . You ______ be hungry already — you had lunch only two hours ago!

A．wouldn’t

B．can’t

C．mustn’t

D．needn’t