Underline the correct modal verbs:

1) Scientists don't have to/must consider the dangers of cloning.

2) People mustn't/don't have to be experts to operate a DVD player.

3) You must/mustn't switch off your computer when it is not in use.

4) She has to/mustn't be 20 years old now.

5) You have to/mustn't be careful with electricity.

6) People don't have to/mustn't take computer lessons to use a computer.

7) John mustn't/has to study hard if he wants to become a robotics engineer.

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Дениса

12 августа, 01:19

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Бонифатий · Answer 1

1) must

2) don't have to

3) must

4) has to

5) have to

6) don't have to

7) has to