第32题: [单项选择]A. The presence of life-forms far below the Earth’s surface. B. The risk of infection from rare strains of bacteria. C. Fictional representations of a hidden underground world. D. The reliability of evidence collected by new drilling methods. 参考答案:A 答案解析:[听力原文] W: Today’s guest on "Science Update" is David Brown. Dr. Brown, you and your team have fou