根据情景选择正确的答案。

1. 你们班新来了一位同学，你想把他介绍给大家，你应说：[ ]

A. He is Tom, this is my new classmate.

B. This is Tom, our new classmate.

C. We have a friend.

2. 当你感到饿的时候，你应说：[ ]

A. I am fine.

B. I am hungry.

C. What is this?

3. 当你想告诉别人你来自中国时，你应说：[ ]

A. He is from Chinese.

B. I am from China.

C. I am from Canada.

4. 当别人问你问题你不知道时，应说：[ ]

A. Sorry. I don't know.

B. OK.

C. Great.