HelivedinLondonfor3months,during

发布时间:2020-07-26 10:45:58

He lived in London for 3 months, during ________ he picked up some English.A.thisB.whichC.thatD.when

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B解析非限制性定语从句,代指前面的分句,只能用which来引导,during为介词。
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