2012 Jiangxi Question 75 Single-choice Differentiating 2012_省自主命题(江西) 75. What is the main idea of the passage? A. Air travel benefits people and industries.B. Train Travel has some advantages over air travel.C. Great changes have taken place in modern travel.D. The high speed of air travel is gained at a cost. Answer keyD ☆ SaveCan't do it, show the explanation查看原卷 →