6. A. He is thirty.
B. He is a teacher.
C. He is my English teacher.
7. A. What’s your name? B. Welcome to our class. C. Hello!
8. A. Fine, thank you. B. How do you do? C. I work very hard.
9. A. See you. B. Good night. C. Goodbye.
10. A. Thanks, but it’s just so-so.
B. Thanks.
C. No, it isn’t.