1. 从方框中选择正确的疑问词，并将其正确形式填写在相应的横线上。

when    why    what    where    which

1. （1） — do you like to watch TV?

   — Because the TV show is wonderful.

3. （2） — do you usually do on the weekend?

   —I usually go for a walk in the park.

5. （3） — class are you in?

   —Three.

7. （4） — do you play football?

   —At 6:00 after school.

9. （5） — are the apple trees?

   —They are in the garden.