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The Docklands Light Railway took just three years to build at a cost of ￡77 million. It is Londons first Light Rail System, but its route follows that of a number of older lines, which carried the nineteenth century railways through the crowded districts of the East End. From Poplar to Island Gardens, a new line crosses high above the dock waters, and then joins the old track of the Millwall Extension Railway, built to service the Millwall Docks and to provide transport for workers in the local factories. This line was horse-drawn for part of its route, until the 1880s. The trains are automatically controlled from a central computer, which deals with all signaling and other safety factors, as well as adjusting speeds to keep within the timetable; on board each vehicle, Train Captains, who are also fully qualified drivers, are equipped with two-way radios to maintain contact with central control. There are passenger lifts, and self-service ticket machines, at every station. A was constructed in the nineteenth century. C follows some of the original lines. 2 We learn from the passage that the LondonBlackwell railway B was a busy line a few years ago. D was not originally a steam railway. A the line from the Tower Gateway Station to Poplar C the Millwall Extension Railway. 4 It appears that the Poplar to Stratford section of the DLR route was originally developed to B encourage trade with the North of England. D make the transport of goods easier. A an on-board central computer. C two-way radios operate by the drivers. 答案：1. C 2. D 3. C 4. D 5. A | 
