单项选择题
A. People were writing things about him that he couldn’t read. B. He wanted to become famous. C. After his hunting accident, he needed something to keep him busy. D. Future generations.
A. genes that can kill cancer B. genes that will lead to leukemia C. viruses that can kill AIDS D. genes that will lead to cancer
A. a mouse appears B. the spotted owl ignores him C. no one answers D. barred owls appear