Task III: Choose the best option in the bracket to complete the sentences.

1. Yesterday I (must/ mustn't/ had to) finish my English project.

2. He will (must/ have to/ has to) wait in line like everyone else.

3. We (must be/ mustn't / have to) on time for work.

4. We (have to not/ must/ mustn't) forget to take the chicken out of the freezer.

5. If you are under 15, you (have/ must/ mustn't) to get your parents' permission.

6. Your child may (have to/ had to/ must) try on a few different sizes.

7. The doctor (must/ mustn't/ have to) get here as soon as he can.

8. Do you (have to/ must/ mustn't) work next weekend?

9. Bicyclists (mustn't/ must/ has to) remember to signal when they turn.

10. Susan, you (mustn't/ must/ have to) leave your clothes all over the floor like this.