Времена группы indefinite active и passive. преобразовать. . 4. before the experiment the substances are mixed in a large cup. 5. the commission will consider this offer carefully before accepting it. 6. in spite of the fact that the report was short, it covered the subject completely. 7. this instrument is preferred to all others because of its great reliability. 8. the doctor said that an urgent operation was needed. 9. they will do everything in their power to help us. 10. i hope we shall never deal with this matter again. 11. the results of the last experiment were constantly referred to by the professor. 12. this airplane crosses the atlantic in about 10 hours.

4. Before the experiment, they mix the substances in a large cup.
5. This offer will be carefully considered by the commission before being accepted.
6. In spite of the fact that the report was short, the subject was covered completely.
7. They prefer this instrument to all others because of its great reliability.
8. The doctor said that the patient needed an urgent operation.
9. Everything in their power will be done to help us.
10. I hope this matter will never be dealt with by us again.
11. The professor constantly referred to results of the last experiment.
12. The Atlantic is crossed by this airplane in about 10 hours.