I was doing my homework when my mother came back.
当我妈妈回来时，我正在做作业。
Tony was drawing a picture while I was doing my homework.
我做作业时，托尼正在画画。
There was, for as long as I can remember, little pursuit of other things like, say, art, besides doing homework every night and taking school tests every two months.
如我所忆，那个时候，我们很少追求其他东西，比如艺术，都是每天晚上没完没了的作业和每两月一次的学校考试。
I had been doing a lot of trig homework for a calculus class I was taking in undergrad and this number appears a lot.
大学上微积分课时我做了许多三角学的作业，作业中这个数经常出现。
I was doing my homework when Joan called this morning.
今天早上琼打电话来的时候，我正在做作业。
I was doing my homework, Mary called me.
当我在做作业时，玛丽叫我。
Peter was doing his homework last night; meanwhile, I was playing PS3.
彼得昨晚在做功课，而同一时间我在玩PS3。
I was 13, doing my homework in front of my family's broken-down television, when I felt strangely compelled to look up at the screen.
在我13岁的时候，有一次正在家里一台破旧电视前写作业，这时候，一个奇怪的冲动让我抬起头看了看电视屏幕。
I was doing my homework at my home. My father was writing a composition in the study room.
我正在家里写作业，我爸爸正在书房里写作文。
I was doing my homework when Li Ming called me last night.
昨晚我正在写作业时李明给我打电话。
I was doing my homework when Li Ming called me last night.
昨晚我正在写作业时李明给我打电话。
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