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She knows so much about England. She ________ there before.
A.must beB.must have beenC.must liveD.must have lived in

答案
B
解析

核心考点
试题【She knows so much about England. She ________ there before. A.must beB.must have】;主要考察你对虚拟语气等知识点的理解。[详细]
举一反三

—Must I stop eating roast pork and ice cream to lose weight?—No, you _________. You should cut them down and have a balanced diet.
A.ought not toB.can’ tC.don’ t have toD.mustn’ t

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---- You _____ have given them some advice.
---- So I did, but who cared what I said?
A.mustB.ought toC.mightD.could

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Teachers recommend parents       their children under 12 to ride bicycles to school for safety.
A.not allowB.do not allowC.mustn’t allowD.couldn’t allow

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we___________last night,but we went to the concert instead.
A.must have studiedB.might studyC.should have studiedD.would study

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I’m afraid Mr. Harding_________see you now. He’s busy.
A.can’tB.mustn’tC.shouldn’tD.needn’t

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