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Complete these sentences with one of these phrases:
has to
have to
don't have to
doesn't have to
1.
I ________ go right now. I'm very late!
2.
It's OK - you ________ do anything. Just sit there and wait for me.
3.
Wait for Greg. He ________ make sure that the door is locked.
4.
A good student ________ be very organized. Organization is very
important.
5.
It's a free museum - we ________ pay anything.
6.
At the end of the year the students ________take an exam. It's
necessary for them to continue the course.