答案：B

题目分析：You are welcome不客气（用于致谢时的答语）；Never mind没关系（用于道歉时的用语）；I have no idea我不知道；That’s right这是对的。

点评：本题难度适中。交际用语是近几年高考的热点，交际用语的考查要放在上下文语境中理解运用，要灵活运用灵活掌握。

即学即练：—Walking an hour every day is good for one’s health.

—Certainly. However,_______.

A. I love doing it very much

B. I don’t hate it

C. I don’t like to do it every day

D. climbing a mountain is also good

解析：C。句意：--每天散步一个小时是有益的。--当然，可是我不喜欢每天这样做。