完形填空(阅读下面的短文，然后从四个答案中选出最佳答案)

Thomas Edison 1 a famous American scientist. He was born 2 1847. When he was 3 child, he liked to 4 how things worked. He was in school 5 only three months. He 6 his teacher a lot of strange questions. Mostof them 7 his lessons. 8 teacher thought the boy 9 bright and was not worth 10 11 he told this to Edison's mother, she took her son 12 school. As she 13 a teacher, she taught him 14 . The boy read 15 . Soon he 16 very interested in science, 17 the age of ten, Edison 18 a chemistry lab for himself. Ever since then, he never stopped searching for new and 19 ways 20 .

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