33.Entering the hall, I found them at a desk, a lecture A.seated; attending B.seating; attending C.seat; attend D.seated; attended 【查看更多】

 

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Entering the hall, I found them ________ at a desk, ________ a lecture

A.seated; attending                                         B.seating; attending 

C.seat; attend                                              D.seated; attended

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