could you tell me the way to the post office?sorry,i don't know.go and ask ( ) policeman 里填

问题描述:

could you tell me the way to the post office?sorry,i don't know.go and ask ( ) policeman 里填
什么冠词?是不是the 为什么?

the,填the,因为这里是特指一类..而A是指某一个..