1. (2021五下·兖州期中) 选词填空，完成句子。

What  Where  Which  When  Why

1. （1） — do you often do?

   —I often clean my classroom.

3. （2） —season do you like best?

   —I like fall best.

5. （3） — is the trip this year?

   —It's in October.

7. （4） — do you like spring best?

   —Because the weather is nice.

9. （5） — is your bag?

   —It's on the desk.