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A) 1. To use electric locos for shunting operation is not economic (= It is not economic to use electric locos for shunting operation). 2. To provide regular maintenance of the car is necessary. (= It is necessary to provide regular maintenance of the car). 3. To increase the speed of this car is hardly possible. 4. It is very difficult to drive a car in a big city. 5. The task of the workers was to repair the track as soon as possible. 6. Although David started his career as a small clerk, his aim was to become a head of a big business. 7. Our work is to test motors. 8. I asked them to meet me at the airport. 9. It was late so we decided to take a taxi home. 10. Suddenly the engine began to make a strange noise. 11. We stopped in order to fuel our car. 12. To cross the river, you have to take a ferry because the bridge is under repair. 13. Our bag was too heavy to carry, and we had to take a porter. 14. In the 19th century the railway tunnels were made as small as possible to reduce construction costs. 15. The method is not good enough to be used everywhere. 16. To stop the car the driver had to use the hand brake. 17. This railway was built to connect central and eastern regions of the country. 18. The next plane to arrive at gate 4 will be Flight 61 from Buenos Aires. 19. He was the last to get on the train. 20. Computers work according to the program to be prepared in advance. 21. If I have any news, you will be the first to know. 22. People to be invited to the conference will receive special invitations.
B) 1. The engine to be installed in this car is very powerful. 2. To use steel rails instead of wooden ones was a great step forward. 3. To cross gorges, canyons and ravines people build viaducts. 4. The use of the new equipment enabled us to minimize the number of workers. 5. Russia was the first to create an automatic engine driver. 6. A special committee was set up to examine the details and causes of this accident. 7. It was necessary to install the block signals on all the railroads. 8. The function of railway signals is to keep the trains at some distance from one another. 9. The new tunnel to be constructed here will be the longest in the country. 10. I have learned to drive a car rather quickly. 11. To avoid accidents the driver must strictly follow traffic rules. 12. The aim of reconstructing this railway is to increase the passenger train speeds up to 240 km/h. 13. To carry all kinds of bulky materials that can’t be exposed to the weather, railroads used covered hopper cars. 14. To carry bulky goods is impossible without specialized cars. 15. In the USA the Baltimore Railway Company was the first to put forward the idea of centralized railway traffic. 16. It is dangerous to stand on the step of a moving train. 17. The railways continue to increase their speed to compete with air and road transport. 18. The problem was to choose the best project out of seven. 19. To get to New Orleans we shall have to change trains in Birmingham. 20. Our design bureau has developed spiral escalators to be used in public buildings. 21. Ten miles is a long distance to walk. 22. Goods to be shipped to the north are stored at the railway station.
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