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题目
题型:不详难度:来源:
She’s already two hours late. What ______ to her?
A.can have happened B.may have happened
C.should have happenedD.must happen

答案
A
解析
can表推测,只用于否定句和疑问句中。
核心考点
试题【 She’s already two hours late. What ______ to her?A.can have happened B.may have】;主要考察你对一般现在时等知识点的理解。[详细]
举一反三
He feels that his health ____ owing to ____ a long walk every other day.
A.is improving; takingB.has been improved; being taken
C.improved; takenD.is improving; have taken

题型:不详难度:| 查看答案

---Would you please give him the paper the moment he ____?
--- No problem.
A.arrivesB.appearingC.cameD.reaches

题型:不详难度:| 查看答案

. Our TV sets sell well, but ten years ago no one could have imagined such a big share in the market that they ____.
A.were havingB.had hadC.were to haveD.had

题型:不详难度:| 查看答案

The truth, Sir, is that the old man____ across the street when my car hit him.
A.was to walkB.had been walkingC.walkedD.was walking

题型:不详难度:| 查看答案
Over the past decades, sea ice _______ in the Arctic as a result of global warming.
A.had decreasedB.decreased C.has been decreasing D.is decreasing

题型:不详难度:| 查看答案
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