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改错:I was just (falling sleep) last night (when) I (heard) a knock (at) the door.

分类: 作业答案 • 2023-01-04 12:37:34

问题描述：

改错:I was just (falling sleep) last night (when) I (heard) a knock (at) the door.

答

falling asleep: "入睡",不能说falling sleep