题目内容：

It is reported that Stephen Hawking. the most famous physicist of his time, has died at the age of 76.  A family member said Hawking, who was British, died peacefully early Wednesday March 14 at his home in Cambridge, England. Hawking was known worldwide for working to explain something about the universe(宇宙) and black holes.

Hawking suffered from a disease called amyotrophic lateral sclerosis, or ALS(肌肉萎缩性侧面硬化病) in 1963. At the time, doctors thought he would only live about two years. But he lived more than 50 years more and continued his scientific work. Because of it, Hawking had to stay in a wheelchair and lost his ability to speak. Hawking had to communicate with others by using a voice synthesizer(语音合成器)．

In his 2013 book My Brief History  Hawking told his readers about his illness. “ I felt it was very unfairwhy should this happen to me? ”He added, “At the time, I thought my life  was over.” “But now, 50 years later, I can be quietly satisfied with my life, ” he wrote. His goal was that he could understand the universe completely. He was also a big supporter of human space travel to the Moon and Mars. “We are running out of space and the only places to go to are other worlds. It is time to explore other solar systems，”  he said last year.

Hawking was an outstanding scientist and a fighter who struggled against the disease and contributed greatly to mankind's understanding of science. He and his contribution will be remembered forever.

1.When did Stephen Hawking get the terrible disease?

A. At the age of 21. B. At the age of  76.

C. At the age of 63. D. At the age of 18.

2.What does the underlined word “it”  in Paragraph 3 refer to?

A. Getting the terrible disease.

B. His book My Brief History.

C. His studies about the universe.

D. Achieving his goal.

3.Which of the following is TRUE according to the Passage?

A. Hawking is a famous physicist from Harvard, the USA.

B. Hawking spent his life studying something about the universe and black holes.

C. Hawking didn't think that people should explore other solar systems.

D. Hawking wrote a book called My Brief History in 2003.

4.What's the main idea of this passage?

A. Stephen Hawking and his well－known books.

B. Stephen Hawking was a brave man who never gave up his life.

C. A great physicist Stephen Hawking who made a big difference to the world passed away.

D. Stephen Hawking was so unlucky that he got a terrible disease.