6. Translate the following sentences into Russian.

1. When completed in 1897, Gefferson’s building was the largest and costliest library in the world. 2. Though being a school teacher of mathematics all his life, Tsiolkovsky concentrated his attention on man’s travel into space. 3. If compared to today’s TV programme, the first black-and-white pictures were not very good. 4. While being a teacher of deaf people Bell became interested in sound and its transmission. 5. Though discovered, Newton’s mistake had no influence on his theory. 6. While working at a new transmitter for deaf people Bell invented a telephone. 7. If heated to 100º C water turns into steam. 8. With the first steam engine built in the 17-th century, people began to use them in factories. 9. The inventor was demonstrating his new device, with the workers watching its operation attentively. 10. With his numerous experiments being over, Newton was able to write his work very quickly. 11. With the current being switched on, the machine automatically starts operating.

7. Change the complex sentences with Participial Constructions.

1. When he was translating the article he used a dictionary. 2. While the student was working at the problem he made many experiments. 3. When the worker was experimenting with this substance he was very careful. 4. After he had left the house he walked to the nearest metro station. 5. When I looked out the window I saw Mary coming. 6. As we finished our part of the work we were free to go home. 7. As Ann had had no time to write to us a letter she sent a telegram. 8. The worker who is repairing the machine is very skilled. 9. The students who are doing the laboratory work are from various faculties.

8. Translate the sentences into English.

1. Читая книгу, он обычно делает заметки. 2. Прочитав текст, мы обсудили его. 3. Отвечая на вопросы, он сделал несколько ошибок. 4. Ответив на вопросы преподавателя, мы начали переводить новый текст. 5. Являясь хорошим проводником электричества, медь широко используется в промышленности. 6. Увидев зеленый свет, мы перешли улицу. 7. Покупая газету, он потерял деньги. 8. Купив газету, он пошел к метро.

9. Translate the text without a dictionary.

A new vacuum-controlled constant velocity carburetor developed by an American company offers several advantages over ordinary carburetors, including 25 per cent gasoline economy, improved engine performance and easier starting. The device having only 54 parts compared with some 300 in conventional carburetors has no choke (дроссель). It constantly adjusts the mixture of fuel and air, which cannot be done in usual carburetors. Provided with special mechanism the carburetor helps the engine turn on at once in cold weather. Though developed quite recently it is already being used by cars and other kinds of public transport. With diesel engine becoming almost standard equipment, the vacuum carburetor will never be used on new cars. It may be said that present-day carburetors are a dinosaur and in 20 years there won’t be any more. But there are some countries which are interested in importing the device as a replacement for existing carburetors.