问题描述：
There--- an important meeting the day after tomorrow.
是 is 是 are 是 will have 是 is going to be
is going to be 那如果我用is，理由是现在进行时表将来呢？可不可以
是 is 是 are 是 will have 是 is going to be
is going to be 那如果我用is，理由是现在进行时表将来呢？可不可以
问题解答：
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