阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。
You are twenty-one years old and live a happy and peaceful life. ____ one day, your doctor tells you that you have a serious disease and will die soon. What would you do?____ (probable) most of us might feel very sad and give up our dreams and hopes for the future. Here is ____ the great scientist, Stephen Hawking, did.
Hawking wasn't ____ (discourage) because of his physical condition.____, he went on with his study of the universe. In 2002, Hawking was invited to China. He told Chinese students about his theories and thoughts ____ some of the greatest questions: what is time, how the universe began, and what are black holes. He impressed the audience with his humor, confidence and of course his ____ (wise).
Hawking became famous in the early 1970s. In 1988, he wrote A Brief History of Time, in ____ he explained difficult theories in a simple way. The book ____ (sell) well since it came out.
Stephen Hawking is a man with a strong will and he is regarded as the ____ (great) mind in physics since Albert Einstein.
