阅读短文，从短文下面方框中的六个句子中选择五个还原到短文中，使短文通顺完整、衔接自然。
Stephen Hawking was born in England in 1942. He is one of the most well-known scientists on space and time in the world. Hawking researched how the universe began and how it ends.
When he studied math and science at Oxford University, he became seriously ill, which made him unable to speak or breathe without the help of machines. Till his death, he couldn't move or feed himself and he was helped to dress, eat and wash by a nurse. Then he got a wheelchair with a special computer.
Although Hawking had so many difficulties, he refused to give up his hope of living and went on to study at Cambridge University after graduating from Oxford University. In 1965, he got a Doctor's Degree of philosophy (哲学). , Because of his serious illness, it was difficult for him to draw or to write. So he started to think in pictures. With this new way of thinking, he is respected by people in the world. Then in 1988, he wrote his first important book, A Brief History of Time. It has been sold more than 5. 5 million copies in 33 different languages.
. His self-confidence and humorous conversations impressed us deeply. From Hawking's unusual experiences, we learn that nobody should lose hope, no matter how bad the situation is. As he once said, " Life is not fair. "
A. He was once invited to China to give speeches.
B. He began to question the big bang theory (理论).
C. He is called the King of the Universe.
D. Then he worked as a professor at Cambridge University.
E. You just have to do the best you can in your own situation.
F. With it he could communicate with others.
And it has continued to spread. 
