c. Fill in the blanks with MUST or MUSN’T
1. She is ill, so she ____________ see the doctor.
2. It is raining. You ____________ take your umbrella.
3. You ____________ throw litter on the stairs.
4. This is a secret. You ____________ tell anybody.
5. You ____________ make noise in the library.
6. We ____________ hurry or we will miss the bus.
7. You ____________ eat fruit and vegetables.
8. The baby is sleeping. You ____________ shout.
9. You ____________ be friendly to everybody.
10. You ____________ walk on the grass in the park.