Cathie didn't know(where could we buy the tickets/what was he waiting for)因该选哪个
问题描述：
Cathie didn't know(where could we buy the tickets/what was he waiting for)因该选哪个
答
后面的 因为宾语从句要用陈述句语态哦!后面的是what was he waiting for也不是啊哦！那就不对了啊！你确定题目没错？！还有两句话，但时态有问题- -这我怎么破！