填入适当的疑问词或疑问词组。

1. -________ season do you like best?

    -Fall.

2. -_______ are they?

    -Twenty  yuan.

3. - _______ students are there  in your class?

    -There are thirty-seven.

4. - ________ do you go to school?

    - I go to school at 8:00.

5. -_______ do you do on the weekend?

    - I go hiking.