what is more difficult 是一个名词性从句,意思是更困难的东西,可以在句子中作主语或宾语.
What is more difficult is that we don't know where we should go.更困难的是我们不知道应该去哪儿.
what is more difficult 是一个名词性从句,意思是更困难的东西,可以在句子中作主语或宾语.
What is more difficult is that we don't know where we should go.更困难的是我们不知道应该去哪儿.