问题描述：
是选A还是D呢?为什么不选 A
Jack ___ leave ___ his teacher comes back.
A:doesn't ; until B:\ ; until C:won't ,\ D:won't ; until
Jack ___ leave ___ his teacher comes back.
A:doesn't ; until B:\ ; until C:won't ,\ D:won't ; until
问题解答：
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