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当他进来时,我正在做作业用英语怎么说I was donging my homework _ he came in.

分类: 作业答案 • 2021-12-19 11:37:49

问题描述：

当他进来时,我正在做作业用英语怎么说
I was donging my homework ____ ____ _____ he came in.

答