题目：
A. Sure. What is it
B. It’s very nice of you to say so.
C. It’s nothing.
D. Have a nice trip!
E. Certainly. Here you are.
A:I’m sorry to have kept you waiting for so long.
B:______ I’ve been killing time by listening to music.
答案：
参考答案：C
解析：上文是道歉的话，下文应该说“没关系”。本题选C。
