问题描述：
为什么是Why don't you have some water. 而不是Why don't you have any water
还有个问题
If we are to catch the first train,we have to hurry.It ____at 7:55.
为什么用starts，不能用is starting?
还有个问题
If we are to catch the first train,we have to hurry.It ____at 7:55.
为什么用starts，不能用is starting?
问题解答：
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