21. —To tell you the truth, I wouldn’t be happy living in such a small room.
— . I do prefer a small room.
A.I agree with you B. It’s OK with me
C. It just depends D. I’d rather not
22. —I’m sorry , but there’s no smoking on this flight .
—Oh , I that. Sorry, I won’t again.
A. don’t know B. won’t know
C. didn’t know D. haven’t known
