1. G: Grandpa, how did you go to work in the past?

M: I went to work on foot.

2. G: Bob, what did you have for lunch?

    B: I had some rice and chicken.

3. G: Where did you go last week, Jack?

    B: I went to Beijing with my parents.

4. B: Susan, is your mother a nurse?

    G: No, she isn’t. She is a doctor.

5. B: Is Mr Wu a Chinese teacher?

    G: No. He is a music teacher. But he taught Chinese two years ago.