1. A fire in an enclosed space burns with the aid of reflected radiation that preheats the fuel, making ignition much easier and flames spreading more quickly. (A) flames spreading (B) flame spreads (C) flames are caused to spread (D) causing flames to spread (E) causing spreading of the flames 答案是D 答案A的错是不是因为 ignition 是状态, flames spreading 是动作. 如果改成flames spread是不是也行呢? 那样就是making ignition much easier and (making) flames spread more quickly. 更进一步, GMAT中动作和状态的并列是不是不允许的, 比方说此例. 可不可以当作公理推广? |