Stephen Hawking was good but never the best student in his class at high school. He went to Oxford University to ___1__ ___2___, then to Cambridge University to study cosmology（宇宙学）. He didn’t work hard, but still got __3__ ___4___.
At 20, he got an incurable illness which would in the future make him ____5___ to speak, ____6___ or move. The doctor said he had only 3 years of life left.
