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.
特别是d和e两个选项的选择上，搞不清楚flames to spread和spreading of the flams的区别，谢达人
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.
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发表于 2006-8-1 10:57:00
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