录音（MA）Oh,no. Look at this red paint on my new jacket. Why did the school paint that railing anyway?
(WA) Oh，that’s too bad! You’d think they might at least have put up a sign.
选项
(A) she doesn’t like the color of the man’s jacket
(B) the railing didn’t really need to be painted
(C) the school could easily have prevented the problem
(D) The man should have been more careful. Answer (c) at least have put up a sign什么意思？ | 
