根据对话内容，从下面方框中选出恰当的句子补全对话。

A: Hi, Mary. I have just received a new postcard from my American pen pal.

B: Really? Let me have a look. Wow! It's wonderful.

A: Yes, because I can learn different cultures from them.

B: Many people enjoy collecting them.

A: Do you collect anything?

B:

A: Can you tell me why you like it?

B: Because it makes me relaxed.

A: Do you think developing hobbies is important?

B: Yes.

A: You are right. I agree with you.

A. Yes, I like collecting different kinds of CD. B. Hobbies can make us relaxed. C. Do you like collecting postcards? D. That's a great hobby. E. So I often listen to CDs when I am not feeling good.