题目内容
—What ________ to the boy a moment ago? —The knife cut his tiptoe.
A.happen | B.happens | C.will happen | D.happened |
D
本题中有个片刻之前的时间短语表示过去,故本题用过去时,happen的过去式是happened,故选D。
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题目内容
A.happen | B.happens | C.will happen | D.happened |