[求助]一个听力 2000年5月的24题

24：

M: Do you think Dr.Luby will lead a theater trip to Broadway in NY city again this year?

W:I don＇think so,I know so!  and I＇ve already signed up for it.

Q:What does the woman mean?

（A)Dr.Luby won＇t be taking students to NY this year

(D)She is going on a theater trip with Dr.Luby

答案是D.很迷惑。不明白 I don＇think so,I know so的意思，为什么是D呢？请指教，谢谢！

I don＇think so,I know so

我不是这样“认为”，（而是）我“知道”(是这样)。

意思就是知道她会去对不对？