1. (2024七上·成都期末)  听句子，根据所听到的内容选择正确答语。

Number one. Are these your grandparents?<br />Are these your grandparents?<br />Number two. Here's your eraser.<br />Here's your eraser.<br />Number three. Thank you for your help.<br />Thank you for your help.<br />Number four. Let's play tennis.<br />Let's play tennis.<br />Number five. How's your first day of school?<br />How's your first day of school?

1. （1）

   A . Yes, it is. B . Yes, they are. C . Yes, he is.
3. （2）

   A . It's mine. B . That's for sure. C . Thanks.
5. （3）

   A . You are welcome. B . Me, too. C . I'm OK.
7. （4）

   A . I'm busy. B . No, I don't. C . That sounds great.
9. （5）

   A . I'm fine. B . It's good. C . That's all right.