1. Fill in must or mustn039;t.1. You look pale. I think

1. You look pale. I think you must see the doctor.

2. It's very slippery outside. You mustnt run there.

3. You mustnt throw litter on the pavement.

4. Children must look neat and clean at school.

5. You mustnt make noise in the library.

6. You must brush your teeth before going to be

7. You must fasten your seatbelt in a car.

8. Children mustnt watch TV a lot.

9. You mustnt light a fire in the forest.

10. You must be friendly to other people.

1. You look pale. Must you see the doctor?

2. It's very slippery outside. Must you run there?

3. Must you throw litter on the pavement?

4. Must children look neat and clean at school?

5. Must you make noise in the library?

6. Must you brush your teeth before going to bed?

7. Must you fasten your seatbelt in a car?

8. Must children watch TV a lot?

9. Must you light a fire in the forest?

10. Must you be friendly to other people?