On March 14, 2017 one of the most famous scientists of all time Stephen Hawking, died at 76 in Cambridge, UK. He is considered as the second greatest scientist 1 Albert Einstein. Hawking was ill 2 he was 21, and he couldn’t walk or talk. He had to 3 in a wheelchair and “speak” with the help of a computerized voice. 4 , his illness could not stop him from achieving great things. He tried his best to make his ideas 5 one by one. He explained that the universe began with the Big Bang (大爆炸) and will 6 in black holes (黑洞) . Black holes suck up (吸进) 7 around them-even light-with their strong gravity (重力) . “My goal is 8 ,” he once said. “It is a complete understanding of the universe, why it is as it is and why it exists.” He wrote A Brief History of Time (时间简史) , and it is 9 around the world. In the book, he tells us the start and end of the universe. He also wrote 10 for children, like George and The Big Bang (《乔治的宇宙大爆炸》) . He wrote them in such simple words that all the kids could understand them and learn something about space. ( )1. A. later B. ago C. before D. after ( ) 2. A. when B. if C. until D. unless ( ) 3. A. sit B. talk C. write D. sleep ( ) 4. A. Luckily B. Instead C. However D. Sadly ( ) 5. A. come out B. come across C. come true D. come on ( ) 6. A. start B. arrive C. end D. stay ( ) 7. A. nothing B. everything C. something D. anything ( ) 8. A. easy B. simple C. bored D. enough ( ) 9. A. exciting B. enjoyable C. popular D. special ( ) 10. A. posters B. letters C. emails D. books