根据短文内容和所给中文提示，写出空白处各单词的适当形式，每空限填一词。
George Stephenson was born in 1781 in a 1 （贫穷的） family. He had to start work when he has only 2 （八） . When George was fourteen, he became his father’s helper. He spent a lot of time 3 （学习）about engines. And on holidays he often made one engine to pieces and studied each piece 4 （仔细地）. Soon he became a very good worker 5 （虽然）he could not read or write. He began to learn English letters when he was seventeen years old. Every day after he did twelve hours of hard work, he walked along way to have 6 （功课） from a young school teacher. On his eighteenth 7 （生日）, he wrote his own name for the first time in his life. George 8 （发明） many things in his life. The train was the greatest one among 9 （他们）. Today when we take trains from one place to 10 （另一个） we’ll think of this great man ——George Stephenson.