Messages ______ be changed from sound into electricity before they ______ be sent by radio.

A. must; will   B. have to; can      C. can; must    D. need; may

 The whole building _____ burned down, but the heavy rain _____.

A. might have; would help

B. could have been; helped

C. must have; helped

D. should have been; was helping

 —Many people in England love to give advice on weather reporting.

—Yes, but I think the weather office’s computers _____ be more accurate.

A. can  B. must  C. ought to  D. might

 —Well, I forgot to bring my dictionary here yesterday.

—Actually you _____ it here. You were not allowed to use it.

A. needn’t bring       B. needn’t have brought

C. didn’t need to bring  D. don’t have to bring

 You can’t imagine that a well –behaved gentleman ______ be so rude to a lady.

A. might         B. need           C. should        D. would

 It has been announced that candidates ______ remain in their seats until all the papers have been collected. www.7caiedu.cn

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

 How I wish every family ______ a large house with a beautiful garden!

A. has        B. had         C. will have       D. had had

 —Guess what! I have got A for my term paper.

—Great! You ______ read widely and put a lot of work into it.

A. must             B. should       C. must have            D. should have

 A left-luggage office is a place where bags ______ be left for a short time, especially at a railway station.

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

 —_____ he start at once or wait for a while?

—Let him start at once.

A. Will  B. Would   C. Does   D. Shall