6. 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 Choice A, B, and C are incorrect because a present participial (or –ing) verb must precede flames to form a structure parallel to the phrase making ignition much easier… choice D is correct. Choice E is wordy, unidiomatic, and also awkward in that spreading, although used here as a noun, appears at first to be another present participle that could be modified by more quickly. This is an easy question. E为什么不对?看上去貌似更平行呀 查过了,没有一个比较准确的回复,不知道这次能不能得到比较合理的回答。 |