第2题: [单项选择]Passage Three Questions 32 to 35 are based on the passage you have just heard. A. Call on people to protect sharks. B. Point out the living environment of sharks. C. Explain why the sharks are dangerous. D. An introduction to sharks. 参考答案:D 答案解析:[听力原文]32-35 Scientists say sharks have lived in the world’s oceans for millions of years. Sci