Question

Choose the correct modal verb 1. Pupils must/mustn't obey the teacher. 2. Pupils have to/mustn't use the telephone. 3. You have to/ needn't take off your hats when you enter your classroom. 4. Mobile phones needn't/must be turned off during the lesson. параграф 8 пункти 3,4,7 ст. 206-208 (граматичний довідник)
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Answer 1

1. Pupils must obey the teacher.

2. Pupils mustn't use the telephone.

3. You needn't take off your hats when you enter your classroom.

4. Mobile phones must be turned off during the lesson.