what if we meet a situation _________none of us are able to deal with?

问题描述:

what if we meet a situation _________none of us are able to deal with?
为什么用that

定语从句,that引导从句 修饰situation,用that的原因是,situation是一种情况,that可以修饰“人或物” who \whom修饰人的,which and what 都不符合句意.
如果我们遇到一种我们所有人都解决不了的情况,怎么办呢?