初中英语单项选择一题
--Today is Monday .It's your____to clean the blackboard.
--Yes.I'm on duty today.I'll do that at once.
A.job B.appearance C.turn D.work
but,why?
说明原因,不要长篇大论的COPY!
既然答案都给出了,就表再给个字母刷分了吧．．．