B.                              Stephen Hawking          Stephen Hawking is a famous British scientist. He was often on TV and in magazine. He lived inCambridge and was married with three children.         Stephen had ALS: this disease slowly paralysed him. He couldn’t walk or talk, and he had to movearound in a special wheelchair with a computer. He used a computerised voice system to talk. At first, he usedthe voice system with his finger, and when that became impossible, he used a muscle in his cheek. He evenused this computer to teach math at the University of Cambridge. Because of the disease, Stephen couldn’tlive on his own. A nurse had to help him dress, eat, and take a bath. She was with him 24 hours a day.         Stephen was famous for his studies of black holes, places in space that can suck in everything near them.In 1994, the Hubble Space Telescope (哈伯太空望遠鏡) showed evidence for the existence of a super giantblack hole. The black hole is as large as Solar System. More recently, scientists proved there is another supergiant black hole. The one is located 26,000 light years from the Earth. The energy of the hole is weak, butscientists are now able to record it and prove its existence.          Although he was sick, Stephen never gave up on his life. He still tried his best to work hard on manykinds of studies. He published his best-selling book in 1988, “A Brief History of Time”(時間簡史). Thebook is about the beginning of the world and the universe. It explains the universe in ways even ordinarypeople can understand. Stephen also believed that time travel is possible, and one day people might live onother planets in the universe. He hoped to travel to space himself one day and trained with NASA. 
【題組】4. What can’t we know from the reading?
(A) Stephen is a scientist, a teacher, and a book writer.
(B) Stephen wished he could go travel to other planets one day.
(C) A black hole could be as big as our Solar System.
(D) Even though Stephen were paralysed, he could still talk by himself without any help.