选A,before.
句意：妈妈,下午我可以和Tom出去玩吗?
不行.在你的作业完成之前都不可以.
因为后面是现在进行时的被动语态；选before的话应该用is done,选until应该用has been done.
保证准确率.
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如对回答满意,
--May I go and play with Tom this afternoon,Mum?
1个回答
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