高考英语30分钟专题突破
情态动词
1. after the bell rings, which indicates the ending of the exam, you stay where you are until all your papers are collected．
a．shall b．would c．will d．can
2. —will you please stay here for the concert?
—sorry, i _____ . i’ll have to go to an important meeting.
a. wouldn’t b. needn’t c. mustn’t d. can’t
3.－i missed the first part of the play. it was a pity.
－you ________ home half an hour earlier.
a. should have left b. must have left c. would have left d. need have left
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