请教一个英语问题《2》

都可以。回答Thank you.可以是：
1. My pleasure./It's a pleasure.(或直接说：Pleasure.)
2. Don't mention it.
3. You're welcome.
4. That's all right.
5. Forget it.
6. I'm glad that I could help. (或Glad that I could help. I'd really like to help)
7. Anytime.(随时愿意效劳)
8. Not at all.(英国人常用)
9. No worries.(美国年轻人常用)
10.At your service.(对女孩子用)
11. 甚至有时也可以说：Don't thank me. It's up to your own hard work.不用谢我。这取决于你自己的努力。

前4种绝对可以用来考试的，后几种就不一定了。各个英语国家的英语其实是有差异的，具体怎样用还得入乡随俗。

you are welcome

You're welcome.
That's all right.
Don't metion it.
It's my pleasure.