---Excuse me ,Is this seat taken?---_________,the man got his book and left a few minutes ago .A,I am afaid so B.I don't think so C.I don't know D.I hope so
问题描述：
---Excuse me ,Is this seat taken?---_________,the man got his book and left a few minutes ago .
A,I am afaid so B.I don't think so C.I don't know D.I hope so
答