How ________ you say that you really uuderstand the whole story if you have covered only part of the article?

A．can

B．must

C．need

D．may

A left-luggage office is a place wherebags ________ be left for a short time,especially at a rallway station．

A．should

B．can

C．must

D．will

— Is there a basketabll mateh between the Lakers and the Huston Rockets this evening?

— There ________ be．I'll phone the gym and find it out．

A．might

B．would

C．must

D．could

— Can I tell my best friend about it?

— No,I don't want anyone else to know it．You ________ keep it to yourself．

A．can

B．need

C．must

D．may

NASA's Mars detectot,Opportunity,succeeded in finding signs that water once existed on the planet．It is now believed that the planet ________ life．

A．should once support

B．should once have supported

C．could once support

D．could once have supported

— Munny,the door ________．My keys are locked in it again．

— You ________ it!I told you always to carry your keys with you．

A．can't open;have asked

B．wouldn't be opened;asked for

C．won't open;asked for

D．can't be opened;are asking for

— How much shall I pay for the phone call?

— You ________．This is free of charge．

A．shouldn't

B．can't

C．don't have to

D．mustn't

— What a shame!You didn't seize such a good chance．

— I ________ that job when it wan offered．

A．should take

B．would take

C．must have taken

D．should have taken

— ________ Miss Ann stay out or be shown in,sir?

— Wait out a moment,please．

A．Does

B．Shall

C．May

D．Will

why ________ we eat out when we can easily cook ourselves at home?

A．must

B．shall

C．can

D．may