The world's economic development is not a win-lose game but one in which all ________ be winners.

A. can             B. shall           C. must           D. would

 –Who is the girl standing over there?

--Well, if you ____ know, her name is Mabel.

A. may             B. can              C. must             D. shall

 Lisa hasn’t  lived here for long. She ____ know many people.

A. needn’t        B. can’t           C. shouldn’t       D. didn’t

 He paid for a seat, when he ______ have entered free.

 A. could          B. would            C. must             D. need

 Children under 12 years of age in that country ________ be under adult supervision when in a public library.

A. must            B. may              C. can             D. need

 My MP4 player isn't in my bag. Where ________ I have put it?

A. can             B. must             C. should          D. would

 Liza ___ well not want to go on the trip --- she hates traveling.

A. will            B. can              C. must             D. may

 You ______ see the doctor, Joe. You don’t  look very well.

　A. must           B. shall　　         C. may               D. can

 My father ______ have a large farm and he liked it very much.

A. would            B. used to           C. could             D. ought to

 Excuse me, six, Mr. White has arrived.              he wait outside or just come in ?

A. Shall            B. May               C. Could             D. Must