2 . Only when one loses something valuable _______ its value.

A．he can know

B．he knew

C．can he know

D．did he know

3 . Although you ______ find bargains in London, it’s not generally a cheap place to shop.

A．should

B．need

C．must

D．can

4 . After that he knew he could ________ any emergency by doing what he could to the best of his ability.

A．get away with

B．get on with

C．get through

D．get to

5 . You _____never work too hard in learning a language. That’s what it takes to learn a language well.

A．must

B．can

C．will

D．may

6 . He is a bad-tempered fellow, but he ________ be quite charming when he wishes.

A．shall	B．should
C．can	D．must

7 . A computer_____think for itself, it must be told what to do.

A．can’t

B．couldn’t

C．may not

D．might not

8 . Though he is always thinking much of himself, he ______ be helpful when staying with others.

A．can

B．must

C．should

D．need

9 . I _____ thank you too much for all your help to my son while we were away from home.

A．won’t

B．can’t

C．can

D．will

10 . If you        go, at least wait until the storm is over.

A．can	B．may
C．must	D．will