问题描述：
主语从句前必须要加that吗?这句“He said nothing does not mean that he agreed to your proposals.”
主语从句前必须要加that吗?
这句“He said nothing does not mean that he agreed to your proposals.
主语从句前必须要加that吗?
这句“He said nothing does not mean that he agreed to your proposals.
问题解答：
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