完形填空阅读下面短文, 掌握其大意, 然后从各题所给的四个选项(A、B、C和D)中, 选出最佳选项. Thomas Edison was a famous American __1__. He was born __2__ 1847. When he was young, he liked to find out __3__ things worked. He was in school __4__ only three months. At school he asked his teacher __5__ strange questions. Most of them __6__ not about his lessons. His teacher did not __7__ his new pupil. So he wanted to send Tom __8__ school. When he told this __9__ Edison's mother, she took her son __10__ school. She taught Tom __11__. The boy read a lot. Soon he became very __12__ in science. Later he built a chemistry lab __13__ himself to try out his ideas. But they were poor at that time so he __14__ vegetables in his garden and sold them. __15__ the money he bought things for his lab.

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