【Nash Hsu】評論
過去進行式昨天晚上地震發生的時候，我正在掃地。
【Ya-Ting Chang】評論
I was sweeping the floor when the earthquake occurred late last night。
【River Ch】評論
請加上題目底線部分，謝謝~I the floor when the earthquake occurred late last night.
【【站僕】摩檸Morning】評論
原本題目:15 I the floor when the earthquake occurred late last night.(A)was sweeping (B)been sweeping (C)was swept (D)swept修改成為15 I ______the floor when the earthquake occurred late last night.(A)was sweeping (B)been sweeping (C)was swept (D)swept