根据情景选择正确的答案。 1. 你们了一位同学,你想把他介绍给大家,你: [ ] 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: [ ] 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: [ ] 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,: [ ] A. Sorry. I don't know. B. OK. C. Great.