5 Complete the text with the words in the box.

Most of us admire someone who faces challenges and achieves great things. That's why everyone I know looks up to the scientist Stephen Hawking. He lived somewhere near London until he went to Oxford University. There, he quickly proved himself to be a math genius. However, when he was only 21, doctors told him that he had something called motor neurone disease (MND). Nobody usually lives long with MND, but Hawking didn't give up and, in fact, he lived another 55 years. When he couldn't walk, he used a wheelchair. Soon he lost his voice, so then he used a computerized voice to speak and write his books. He traveled everywhere, giving talks and showing the world what people can achieve when they believe in themselves.