他们自己做家庭作业。
They do their homework by themselves.
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他坚持说是他自己做的家庭作业。
He insisted that he did the homework by himself.
晚饭后他继续在自己的房间里做家庭作业。
He went on doing his homework in his room after supper.
她并没有把这些布置为家庭作业，他们自己要这么做的。
She had not assigned this as homework, they just wanted to do it.
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