What________whenthey________lastTh

发布时间：2020-07-26 09:47:33

What ________ when they ________ last Thursday?A.did you do; were seeing me offB.were you doing, saw me offC.did you do, saw off meD.were you doing, were seeing me off

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B解析B主从复合句中，同时发生两个动作，长动作用进行时，短动作用一般式。
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