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。想问一下E错在哪里,causing和making平行,spreading of the flames作为名词和ignition平行啊? |