Rewrite the following sentences with must, must not, have to, don't have to, should, shouldn't, or ought to. Use each one at least once.

1			Children ________________ drink milk.
2			You _______________ get a license before you get married.
3			You _______________ have a license to ride a bicycle.
4			Parents ______________ leave young children home alone.
5			Everyone ______________ see a doctor once a year.
6			You ____________ smoke near gasoline. It's dangerous.
7			We ____________ go to school today. It's a holiday.
8			You __________ buy a ticket before you get on the plane.