5. Translate the following word combinations into Russian.

To stay at home; another drawback of the new device; to adopt a new system of control; to increase the cost; a new feature of this aircraft; particularly bad weather; it was particularly urgent business; to move forward; to walk across the street; to need little space for taking-off; to gain in speed; to lose speed; to need extra parts; to combine work and studies; to lose time; at a distance of nearly two miles; to observe weather changes; on the upper shelf; low clouds; to move very fast; the density of the atmosphere; the advantages of the new aircraft design; to fit extra seats; a strong water flow; to convert work into energy; a skilled worker; available extra parts; to recognize the trouble in the engine; densely-populated countries; this fact alone; to take precautions against engine break-down; to be capable of solving complicated mathe­matical problems; to seem merely a chance; a backward student; to be no longer significant; besides you and me; huge cargo

6. Translate the following sentences without dictionary paying attention to underlined words.

1. a) An aircraft with engine trouble must land, b) We didn't get to town until late at night because there was serious engine trouble in our car. c) Cars with troubles of this sort are easily repaired at every service station, d) Stoppage of fuel supply caused serious trouble in the engine.

2. a) The bombers were quickly converted for use by passengers by fitting extra seats and windows, b) Have you got an extra ticket? c) On Sundays they run an extra train, d) People who work and study get extra leave during examination time.

3. a) After World War II, bigger and faster airliners were introduced.

b) If you can get a ticket for the fast train, you'll get there in time.

c) Which of you runs faster? d) The plane is the fastest means of tran­sport.

4. a) Helicopters gain in needing very little space for taking-off and landing, b) Comrade Petrov gained a lot from his trip to the north of our country, c) By reading this journal you'll gain a lot of important information on the research going on in this field.

5. a) Air transport cannot be relied upon for regular services in places or seasons with low clouds and mist, b) The temperature is very low today, you should put on warm clothes, c) Low hills were covered with green grass and flowers, d) The picture hangs too low, move it up a little.

7. Translate the following sentences into Russian paying attention to the conjunctions of Conditional sentences if, unless, provided.

If they needed the equipment urgently, it would be sent by plane. 2. The accent would not have happened, if they had been more care-full. 3.If I were in his place, 1 should refuse to stop the experiment. 4. If the goods are shipped in April, they will arrive before the expedi­tion starts. 5. The sputnik will keep to its orbit provided it travels at the uniform speed of 8 kilometers per second. 6. It would have been impossible to send up sputniks unless the laws governing the motion of planets had been studied. 7. We shall carry out our production plan engines. 10. If computers had not been out, many important problems would not have been solved. 11. If he did not know how to operate the new device, I should explain it to him.