题目内容：

改错.1.I must give her medicine in the right time.2.Those policeman can speak many English now.
3.Did you visit your sister in Monday morning?
2题是 policemen

优质解答

in 改成at 固定搭配 at the right time 在合适的时候
many 改为much English不可数用much
in改成on 具体某一天用on