--Whendidthisaccidenthappen?--Ithappened________sixo'clock________the

发布时间:2020-08-06 04:49:21

--When did this accident happen?--It happened ________six o'clock ________ the afternoon of last Monday.A.at; inB.in; onC.about ; atD.at; on

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D解析具体的时刻前用介词at,特指某一天时用介词on。
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