問題詳情

9.A: Who ______the floor? It looks clean.B: It ______by my sister ten minutes ago.
(A) mopped ; is mopped
(B) mopped ; was mopped
(C) mops ; was mop
(D) is mopping ; was mopped

參考答案

答案:[無官方正解]
難度:計算中-1
書單:沒有書單,新增

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