--May I go and play with Jack this afternoon.Mum?----No.you can’t go out your homework isn’t finished．A. when B. until C. since D. after 题目和参考答案——青夏教育精英家教网—

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——May I go and play with Jack this afternoon，Mum?--

——No，you can’t go out_______your homework isn’t finished．

A. when B. until C. since D. after

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