第24题: [单项选择]Passage Three Questions 33 to 35 are based on .the passage you have just heard.[A] Lightning and thunder. [C] A great deal of water vapor and a rapidly rising air current. [B] Warm air and cold air. [D] A great amount of vapor and electricity. 参考答案:C 答案解析:[听力原文] What are the two conditions that must exist for thunderstorms to develop