InthosedaysJohnwithhisclassmates&n

发布时间:2020-07-15 14:26:23

In those days John with his classmates  _____  kept busy preparing for the examA.isB.areC.wasD.were

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C解析本题中在那些天表示的是过去,用过去时,本题的主语中心词是John,为单数第三人称,故用was,故本题选C。
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