问题描述:
it _____ now pretty late , we took our things and retired to our room
答案选 being .这是一个独立主格? 请高手讲解一下怎么判断的?
答案选 being .这是一个独立主格? 请高手讲解一下怎么判断的?
问题解答:
我来补答展开全文阅读