Speaker A: It’ s already late. I think I’ d better go now. And thank you for the dinner.
Speaker B:（）

A. Yes, I won’ t be going home until Friday.
B. No. I have a class until one o’ clock, and after that I’ m going to spend a couple of hours at the library before going home.
C. Yes. But I am afraid I have to stay for a few hours in the city library before going home.
D. Yes. If I were you, I wouldn’ t go home directly.

A. I really don’ t know
B. It’ s really not necessary
C. I really don’ t bother
D. It really makes no sense