1.  听句子，选择合适的答语。

1. （1）

   A . Yes, we do. B . No, they aren't. C . Yes, we are.
3. （2）

   A . We're playing volleyball. B . They're playing football. C . You're playing basketball.
5. （3）

   A . They're watching the games. B . No, they aren't. C . No, she isn't.
7. （4）

   A . No, I don't. B . OK. Let's go! C . We're watching the games.
9. （5）

   A . The boys are playing ping-pong. B . The girls are playing badminton. C . That's great!