Fill in the blanks with affirmative or negative forms of must or have to & has to.
7. You ............ return them. They are too small for you.
8. I am broke, I ............ borrow some money to buy a car.
9. You .................. stop smoking. It is very harmful.
10. Mr. Dickson is travelling abroad this summer, so he .............. get his passport soon.
11. All the students .................. obey the school rules.