I. Прочтите и переведите предложения. Дайте два варианта перевода инфинитива в функции подлежащего:
1. То isolate the metal plates was the student's task.
2. To create a powerful energy source was of prime importance for a constructor.
3. To provide a high potential is not easy.
4. To determine the volume of a gas at a definite temperature is very easy.
5. To prove this law experimentally is very difficult.
6. To test a new receiver for the application in this system was the main task of the laboratory.
7. To test the equipment is possible only under vacuum conditions.
8. To raise the cathode temperature means increasing the number of emitted electrons.
9. To obtain new data on the wave travelling was necessary for future investigations.
10. To build a network of transmitting stationsin that region was of prime importance.
II. Прочтите и переведите предложения. Дайте два варианта перевода инфинитива в функции именной части составного сказуемого:
1. The student's task was to study the propertiesof this substance.
2. The task is to provide low pressure.
3. The main aim of the designers is to improve TV communication over long distances.
4. The problem is to find materials which are not sensitive to light.
5. The purposeof the experiment is to convert heat directly to electricity.
6. The object of this system is to provide a powerful energy supply.
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