大全6的问题

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) flames spreads

(C) flames are caused to spread

(D) causing flames to spread

(E) causing spreading of the flames

答案是D。

为什么A不可以， flames spreading 当名词， 相当于making ignition much easier and （making）flames spreading more quickly.  前面省略了making.

spreading 改成spread就对了，别忘了后面的副词quickly.你就明白spreading不能作名词了吧！

But don't forget the ||.  'making.... and causing.... '  You need causing to parallel making.

if A. 那flames 就合igintion 并列了.

spreading 改成spread就对了，别忘了后面的副词quickly.你就明白spreading不能作名词了吧！ 

running说的好！