6.  A. He is thirteen.    B. My friend.      C. At home.

7.  A. It’s great.        B. For three days.  C. Beijing.

8.  A. No, she isn’t.     B. Yes, he is.       C. Yes, she does.

9.  A. They are students.    B. In the classroom.  C. Telling a story.

10.  A. No, it isn’t.        B. Yes, I can.        C. Yes, I am.