阅读下面短文，按照句子结构的语法性和上下文连贯的要求，从1～15 题所给的A、B 、C和D项中选出最佳选项，并在答题卡上将该项涂黑。 Stephen Hawking was born in Oxford, England on 8th January, 1942. He went to school in St Albans. Although he did well, he was never top of his class. After1 school, Hawking went first to Oxford University2 he studied physics，and then he went to Cambridge University to study cosmology(宇宙学). As he himself admitted（入学）, he did very 3 work. However, he still got better marks than 4 .
It was at the age of 20 that Hawking first noticed there 5 something wrong with him. He started to bump into (碰撞) things. When he visited his family at Christmas time，his mother was 6 worried that she made him see a doctor. Hawking 7 to hospital for tests. Finally, the result came back. Hawking had motor neuron disease（运动神经元疾病）, an incurable illness which would make him 8 to speak, breathe or move without the help of a machine. Doctors said they had no way to help him. He 9 before he was 23. At first, Hawking became very low.
After a while, he began to see his life in 10 different way. As he later wrote, "Before my illness was diagnosed(诊断), I had been very tired of life. It seemed that nothing was worth doing. But shortly after I came out of hospital, I suddenly 11 that there were a lot of worthwhile things I could do." Hawking married, found a job at Cambridge University,12 had three children. He also went to do some of the most important scientific researches.
Hawking worked 13 a professor at Cambridge University 14 his death on March 14, 2018. He 15 believed that no matter how hard life was, nobody should lose hope.
