【单选题】听力原文:M: Good morning, class. W: Good morning, sir. M: Today we'll discuss volcanoes. Can you tell me the most dangerous thing about a volcano? W: I think the most dangerous hazard of a volcano comes f...
【简答题】Passage Two:Questions 26 to 30 are based on the following passage.Last summer, Transportation Secretary Elizabeth Dole announced a new rule: Unless states representing two-thirds of the country’s popu...