单选题：—What did you say to your sister? I saw her crying in the ..

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题目类型：单选题
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—What did you say to your sister? I saw her crying in the room.
— It _________ my fault. I just said hello to her when I met her, nothing else.A．must have beenB．can’t have beenC．oughtn’t to beD．should have been

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Some economists predict that the dollar will remain weak ___..

Some economists predict that the dollar will remain weak _____ economies abroad are expected to growfaster than that of the United States.A. while B. as C. before D. until

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Americans and Canadians can understand each other ______ the..

Americans and Canadians can understand each other ______ they don't speak the same kind of English.A. now that B. even if C. as if D. only if

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Lora，you ____________ leave all your books on the floor lik..

Lora，you ____________ leave all your books on the floor like this!A．wouldn’tB．mustn’tC．needn’tD．may not

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——Mr Smith looks rather a kind man.——But in fact he is cold..

——Mr Smith looks rather a kind man. ——But in fact he is cold and hard on us. You ____ believe it!A．shouldn'tB．wouldn'tC．mustn'tD．needn't

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The school rules state that no child shall be allowed out of..

The school rules state that no child shall be allowed out of the school during the day, _____ accompanied by an adult.A. once B. when C. if D. unless

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