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题目
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If you _______ spit at all. please spit in the bucket provided.
A.shallB.must C.shouldD.may

答案
B
解析

试题分析:考查情态动词。If you must (do sth.)“(表示虽不赞同但可允许)如果你一定要(那么做)”。must“偏偏;非要”,符合句意。句意:如果你非吐痰不可,请吐到专备的痰盂里。故B正确。
核心考点
试题【 If you _______ spit at all. please spit in the bucket provided. A.shallB.must C】;主要考察你对动词的分类等知识点的理解。[详细]
举一反三
The door _______ open, no matter how hard she pushed.
A.shouldn‘tB.couldn"t C.wouldn"t D.mightn"t

题型:不详难度:| 查看答案
My sister met him in the hospital yesterday afternoon, so he _________ your lecture.
A. couldn’t have attendedB. needn’t have attended
C. mustn’t have attendedD. shouldn’t have attended

题型:不详难度:| 查看答案
We can hardly believe such a young boy ______ travel around the world all by himself.
A.mayB.needC.shouldD.must

题型:不详难度:| 查看答案
The door _____ open, no matter how hard she pushes.
A.doesn’tB.can’tC.won’tD.shouldn’t

题型:不详难度:| 查看答案
–I have packed your luggage for you need to rise early tomorrow.
--Thanks. You ______ that. I am a big girl now and I can manage it, Mum.
A.needn’t doB.needn’t have done
C.mustn’t doD.shouldn’t have done

题型:不详难度:| 查看答案
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