this pair of trousers is cheap enough.can i try them/it on?用it还是them?答案用的是it,但是书上shoes用的是them.为什么呢?

问题描述:

this pair of trousers is cheap enough.can i try them/it on?
用it还是them?答案用的是it,但是书上shoes用的是them.为什么呢?