問題詳情

10.Someone knocked on the door when we ________video games in the living room.
(A) were playing
(B) are playing 
(C) have played 
(D) played

參考答案

答案:[無官方正解]
難度:適中0.5
統計:A(0),B(0),C(0),D(0),E(0)

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