--- Can we leave the classroom now?
-- No, you ______. You ______ to leave until the bell rings.
A.mustn’t, are allowedB.don’t have to, are supposed
C.needn’t, aren’t allowedD.can’t, aren’t supposed
D

試題分析:need,需要,否定式是needn’t;may可以,否定式是may not;can是能,能夠,否定式是can’t。must的含義是必須一定,其否定形式mustn’t表示禁止的含義。故must的否定回答一般借助于needn’和don’t have to來(lái)構(gòu)成,句意:現(xiàn)在我可以離開(kāi)教室了嗎。俊,你不能。直到響鈴你才能離開(kāi)。短語(yǔ)be allowed to do sth被允許做某事。Be supposed to do sth應(yīng)該做某事,被期待做某事,結(jié)合語(yǔ)境可知前一空表示客觀上的不能,故用can’t,選D。
點(diǎn)評(píng):情態(tài)動(dòng)詞的考查是初中英語(yǔ)考查的重點(diǎn),平時(shí)學(xué)習(xí)中一定要熟記這些詞的基本詞義及用法上的不同,注意其用法及在句子中表達(dá)語(yǔ)氣的不同?荚囍薪Y(jié)合語(yǔ)境選擇合適答案。
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