Выполнить задание

V. Спишите предложения и переведите их на русский язык, обращая внимание на разные значения глаголов to be, to have, to do.
1. You have to come to the language laboratory to work at your pronunciation.
2.This material does not possess elastic properties.
3. Scientists had to create new materials for industry.
4. The exam was to start in the morning.
5. Man had to learn to obtain electric power directly from the Sun.
6. At present most of the industrial enterprises have their own electric power stations.
7. Specialists do not use solar cells in industry as they are too expensive.
8. The engineers are to study the problem of using cosmic rays.
9. We had to change the design of this room.