While they were doing their homework, I was doing the laundry.
他们在做家庭作业的时候，我正在洗衣服。
Lots of students are too busy doing their homework to help out with housework.
很多学生都忙着做作业，没有时间帮忙做家务。
The children are busy doing their homework.
孩子们忙于做作业。
But this evening, they are not doing their homework.
但是今天傍晚，他们没有做作业。
What are Nancy and David doing? They are doing their homework.
南希和大卫在干什么？他们在做家庭作业。
They are doing their homework.
他们现在正在做家庭作业。
They were doing their homework.
他们正在做他们的家庭作业。
They're doing their homework now.
他们现在正在写作业。
They are doing their homework now.
他们现在正在做作业。
All of them are doing their homework.
他们都在做家庭作业。
The children are doing their homework.
孩子们正在作他们的作业。
Are they doing their homework or playing?
他们在做作业还是在玩儿。
They have finished doing their homework.
他们已经做完作业了。
The children are all doing their homework.
孩子们都在做作业。
They can't have been doing their homework.
他们不可能正在做作业。
They were doing their homework at that time.
在那时，他们正在做家庭作业。
They are doing their homework in the classroom.
他们正在教室里做家庭作业。
It will be weeks before they finish doing their homework.
要过好几周他们才能完成家庭作业。
Some children are playing, others are doing their homework.
一些孩子在玩，一些孩子在写作业。
The children spent the whole afternoon doing their homework.
孩子们花了整个下午做家庭作业。
The smarter ones avoid that pitfall by doing their homework.
明智的人会通过准备工作来避免类似错误的发生。
They are doing their homework instead of tidying up the room.
他们在做作业而不是在打扫房间。
Some children are playing, the others are doing their homework.
一些孩子在玩，其余的在写作业。
While her children were doing their homework, she was doing some housework.
当她的孩子们在做作业时，她在做家务活。
Children are given rewards for eating all their food, doing their homework or tidying their bedrooms.
孩子们因为吃光他们所有的事物、完成他们的家庭作业或者整理好他们的卧室而得到奖励。
For children with learning difficulties, doing their homework is like running with a sprained ankle.
对于有学习障碍的孩子来说，做作业就像是拖着一只扭伤的脚踝跑步。
Quite a few young people nowadays have the habit of listening to background music while doing their homework.
现在有不少年轻人有一边做作业，一边听背景音乐的习惯。
Sam's three children had always been expected to give a hand when they were not in school or doing their homework.
桑姆的三个孩子如果不上学或不做作业，大人就总指望他们帮着干一点。
Thousands of children nowadays prefer doing their homework to a background of pop-music to doing it in a quiet room.
成千上万的孩子如今一边听流行音乐一边做作业，也不愿在安安静静的房间里做。
Thousands of children nowadays prefer doing their homework to a background of pop music to doing it in a quiet room.
成千上万的孩子如今宁愿一边听流行音乐一边做作业，也不愿在安安静静的房间里做。
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