问题描述:
I don‘t like the course because there is nothing to learn from it.
这个it 为什么一定要加?The house is big enough for us to live in.这句句子为什么就不用加it?
这个it 为什么一定要加?The house is big enough for us to live in.这句句子为什么就不用加it?
问题解答:
我来补答展开全文阅读