[問題]大全#6

[lin1234]

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

為什麼不能選(A)呢?

[dibert8]

考平衡.
flames spreading 如果看成是一個名詞和 ignition 不平衡,因為 spreading 表示動作, ignition 是狀態.
但是 more quickly 要求前面的詞性必須是動作;動作加不定詞 (i.e. causing... to spread) 和 making 平衡解決了這個問題.

所以選 (D).