在横线上填上恰当的词，完成下列疑问句。

1. ______________ there a picture in Jack's room?

2. ______________ they want to go to Hong Kong?

3. ______________ I play football this afternoon?

4. — ______________ does Mary go to school?  — On foot.

5. — ______________ grade are you in?  — I'm in Grade 2.

6. — ______________ is this coat?  — 100 yuan.

7. — ______________ is this shirt? Is it Ann's?  — No, it isn't. It's Lily's.

8. — ______________ is your dress?  — It's white.