1. Why must we hurry?
2. Where must they meet as soon as possible?
3. When did you have to work hard?
4. Why will Sally have to explain the details?
5. How long must granddad stay in bed?
6. Why does she have to be careful with that device?
7. What do they have to tell me?
8. How many snacks will mum have to make for the party?
9. Where do we have to stay till midnight?
10. Who has to go to Paris next week?