选出合适的句子完成对话。

A. Whose computer is this? B. Thank you. C. Is this yours? D. It's a picture of a room. E. Is this your room?

A: What's this, Jack?

B:

A:

B: Yes, it is. Look, the desk is mine.

A: How nice it is！

B: Oh, it's my father's.

A: I can see a nice picture on the wall.

B: No, it is my sister's.

A: How nice a room.

B: .