Read and choose.（选择词语填空。注意英语句子的格式。）

what which when who why

1. —             do you do at 8:00 in the morning every day?

    — I do exercises.

2. —             does your's brother like winter?

    — Because he likes skating best.

3. —            is playing football on the playground now?

    — John with his friends .

4. —            season do you like best?

    — It's fall.

5. —             is your father's birthday?

    — It's in March.

有效沟通的要求有哪些