1. 选词填空。

yours;   Whose;   tidying;   Are;   theirs;   swimming

1. （1） — coat is this?

   — It is mine.

3. （2） — Who is up the classroom?

   — Linda.

5. （3） — these your shoes?

   — No, they are .

7. （4） — Are you good at ?

   — Yes, I am.

9. （5） — Lily. Are these shoes?

   — No, they are Sam's.