选择C,
回答感谢的常用答语：
Not at all.别客气；不用谢；哪儿的话.
You are welcome.不用谢.
Please don’t mention it.不用客气；不用谢.
It’s [It was] a pleasure.不用客气；不用谢.
A pleasure.不用客气；不用谢.
It is (was) my pleasure.别客气,这是我高兴做的.
My pleasure.不客气,这是我高兴做的事.
Pleasure is (was) all mine.不客气；不用谢.
No trouble at all.没什么；别客气.
No problem.不客气；不用谢.
It’s [It was] nothing.没什么；不客气.
Think nothing of it.没什么.
That’s all right.没什么；不用谢.
That’s OK.没什么；不用谢.
Any time.不用谢；不客气；有事说一
A:Oh,my goodness.You shouldn't have done that but thank you very much.
B:I'm glad you like it.
A:Thank you for taking the time to come and advise me on the problem.
B:I'm happy to to have done it.
A:Another drink?
B:Yeah.Thanks.
A:Thank you for your trouble.
B:That's all right.
A:I'd appreciate that very much.
B:Please think nothing of it.
A:I don't know what I would have done without the suitcase you lent me.
B:Glad to have been of some help to you.
A:Feel free to give me a call,if you have a question.
B:I appreciate it very much.
A:I appreciate your helping me.
B:Forget it.