1.Look at the tiger in the cage.We are all sorry _____ it.(介词）
问题描述：
1.Look at the tiger in the cage.We are all sorry _____ it.(介词）
2.What do you mean ____ saying that.(介词）
3.同义句,We are going to have a meeting at once
We are going to have a meeting____ ____.
答
1 about
2 by
3 right now
加油!不明白再问!能给出这样填的理由或者相关句形吗，第一题其他两个回答都写for，哪个对？我认为是用ABOUT ， 关于这件事我们都感到很抱歉。