SC 一题求解

comeondaphne · 发表于 2011-7-31 21:20:05

A flame in an enclosed space burns with the aid of reflected radiation that preheats the fuel, making ignition much easier and flames spreding more quickly.
D. causing flames to spread
E.causing spreading of the flames

答案是D 请问E错在哪里（causing 要和making 并列）

comeondaphne · 发表于 2011-7-31 21:55:08

好心人回答一下呗

SC 一题求解

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