Hello,may I speak to Mr.Smith?---I'm sorry,________he is out.A.but B.and C.or D.so

问题描述:

Hello,may I speak to Mr.Smith?
---I'm sorry,________he is out.
A.but B.and C.or D.so

A.固定的表示抱歉的句型 i am sorry but..(加抱歉的原因)