ｐｐ听力

-if i were you i go over to the dean's and sign up.
－i am going to the library to return the book but i can do it later i guess.
what is the man going to do next
a: stop by the dean's office.
为什么答案不是 reture a library book 呢？

第二个人的回答前半部分是对第一个人建议的否定，但后面接了一个转折信号词but. 这里的it指的是 go to the library to return the book 不是 go over to the dean's office.所以他的意思是 本来打算去图书馆还书，不过也许可以晚点再去（先去dean's)