1. 根据对话内容，在每个空白处填入一个适当的句子，使对话完整、合乎情境。

A: Hello, Mike.

B: Hi, Paul.

A: ?

B: Yes, I often go to the zoo.

A: ?

B: I go there with my brother Tom.

A: Have you got a brother?

B: Yes.

A: ?

B: He is six years old.

A: ?

B: His favourite animal is the tiger.

A: ?

B: I like the lion.

A: Me too. It's strong.