--Whathappened________Mary?--Shefelldownandhurtherleg.A.atB.toC.inD.by

发布时间：2020-08-04 16:20:16

--What happened ________ Mary?--She fell down and hurt her leg.A.atB.toC.inD.by

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B解析表示“某人发生了什么事”用what happened to sb..
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