问题描述：
That from then on it is necessary to have an intelligent plan if progress is to be made .
句首的that 有什么作用,可以省略吗
其实完整是这样的The vocabulary of the average person almost stops growing by the middle twenties.And that from then on it is necessary to have an intelligent plan if progress is to be made
句首的that 有什么作用,可以省略吗
其实完整是这样的The vocabulary of the average person almost stops growing by the middle twenties.And that from then on it is necessary to have an intelligent plan if progress is to be made
问题解答：
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