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.
