问题描述：
This is the way ____he solved the difficult prolem.A which B by which C from which D /
解析可以填that或in which ,我不懂为什么可以填that,不是只有在作宾语的情况下才可以省略that吗,that作宾语的话不缺少介词吗?
解析可以填that或in which ,我不懂为什么可以填that,不是只有在作宾语的情况下才可以省略that吗,that作宾语的话不缺少介词吗?
问题解答：
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