3. State the tense-forms of the verbs in the following sentences. Translate the sentences:

1. Scientists are using the energy of atom in various spheres of life.

2. The engineers were attaching the wires to the devices when I came in.

3. At present they are studying various aspects of this problem.

4. When we listen to a radio program we are using the rays that are called radio waves.

5. The scientist was solving a new problem when we visited his laboratory last week.

6. What is she doing this week?

7. John was reading a book when I came to see him.

8. My friend is writing an article for the newspaper.

9. The student was carrying out this experiment for twenty minutes.

10. I’m working too hard this year.

11. Molecules in a gas are constantly moving.

12. The electron is circling in an orbit around a nucleus.

4. Read the following sentences and say which of them are in the Active and which are in the Passive Voice. Translate them:

1. While the experiment was being carried out nobody left the laboratory.

2. A new type of computing equipment is being produced at our plant.

3. At present scientific work is being done mostly by large groups of researchers.

4. The apparatus will be working when you come.

5. The scientists who are carrying out research into nuclear physics deal with the most difficult problems.

6. For twenty minutes the air in the laboratory was being purified by two ventilators.

7. The solar battery is converting the energy of sun rays directly into electric energy.

8. This experiment was being carried out under low pressure.

9. For a long time the electronic devices were being used for control.

10. An interesting research in the field of electronics is being done at our Institute.

11. Prospects of the usage of solar energy are already understood by everybody.

12. Now solar energy is being studied by a lot of research groups.

13. Scientists and engineers are developing new types of electronic and cybernetic devices.

14. The engineers will discuss the advantages of this new system.

15. Our laboratory is housed in an old building.

5. Analyse the functions of the verb to be. Translate the sentences:

1. The results of the experiment are of great importance for our further work. 2. There are no chemical plants in our town. 3. The substance that we are speaking about is water. 4. We are to translate technical literature in the second year. 5. It was the study of natural phenomena that made it possible to formulate various laws. 6. Technical progress is now impossible without high-quality materials. 7. Electronics is being used more and more throughout the industry. 8. The electron is a particle. 9. The machine is of five parts. 10. Our task is to finish the test by 7 o’clock. 11. Words in a dictionary are in alphabetical order. 12. Smoking is dangerous. 13. The temperature is three degrees above zero. 14. My friends are mostly students. 15. It is the only positive solution. 16. The British are very proud of their sense of humor. 17. The scientific discovery was the result of six years research. 18. Our aim is to accomplish this task as soon as possible. 19. He will be an engineer in two years. 20. Their house is in the middle of the village.