Come and see the India elephants and the new tigers from Amercia. The bears are waiting to meet you, and the monkeys from China are waiting to throw things to you. The lovely dogs from Australia are waiting to laugh at you. The giraffes from Brazil are waiting to look down on（俯瞰）you.

按要求填空：

根据对话的情景，从方框中选择适当的句子填在画线处，使对话完整通顺。其中有两项是多余的。
A: Hi, Zhou Yanhong. ____ 
B: I'm reading a book.
A: Oh, do you like reading?
B: Yes, very much. _____ 
A: I like playing the piano.
B: Good. By the way,____ 
A: It's easy and interesting. I like it a lot.
B: But I think it's difficult and boring. ____ I like Chinese best.
A: ____ 
B:Because I think it's useful (有用的) and interesting.