请教一道听力题（2003－08-23），谢谢

crystalno_1

23。M:I am so sorry I overslept.THe whole class will be waiting for us at the museum.

      W:I am not so sure about that.Remember the letter from the museum said that tour was to start probably at nine.

What does the woman think will happen?

(A)The tour guide will be late

(B)The appointment for the tour will be changed

(C)The tour will begin before she and the man arrive

(D)The museum will open earlier than usual

答案选C，请问一下为什么呀？谢谢！

zhoushao

M:非常抱歉，我睡过头了，班里同学都在等我们

W：我不是很确定，记得博物馆的信上说参观将在9点开始

W说这句话的意思就是他们晚了，去的时候大家已经开始参观了，不等他们了，所以选C