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Cloze(完形填空)
When he was ten, Edison built his own chemistry 1 ．He sold sandwiches and newspapers on the local trains in order to earn money to buy 2 for his laboratory．His parents became used, more or less, 3 his experiments, which sometimes 4 the house．
Edison’s work as a salesboy with the railway introduced him to the 5 and, with a friend, he built his own telegraph set．He taught 6 the Morse telegraphic code and hoped for the chance to become a professional telegraph 7 ．A stroke of luck and Edison’s quick thinking soon provided the 8 ．
One day as young Edison stood 9 for a train to arrive, he saw the station master’s 10 wander into the track of an approaching train．Edison 11 and carried the boy to safety．The thankful station master 12 to teach Edison railway telegraphy．Afterwards, in 1863, he became an 13 telegraph operator and left home to work in various cities．
Six years later, in 1869, Edison arrived in New York City, poor and 14 debt．He went to work with a telegraph company． 15 was here that he became interested in the 16 of electricity．At that time electricity was still in the 17 stage, and Edison hoped to invent new ways to use it for the 18 of people．As he once said,“My philosophy of life is work．I want to bring out the 19 of nature and apply them for the happiness of man．I know of no 20 work to do for the short time we are in this world．”
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