IV. Перепишите предложения и подчеркните в них модальный глагол или его эквивалент. Переведите предложения: 1. The students were unable to do work without the laboratory assistant. He had to help them.
2. Your article may be published next month.
3. Computers are to free man from keeping in mind initial figures, intermediate data and final results.
4. One should turn off the light before going out.
5. Some operations for the computer must be changed and new instructions have to be added.
6. Could you speak English a year ago?
7. He was not allowed to enter the concert hall after the third bell.
8. As he received a bad mark, he had to go over the material again.
9. We shall be able to see this film in September.
10. Can you swim?

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