XDF补充教材#3

阳光不锈

A fire in and enclosed space burns with the aid of reflected radiation that preheats the fuels, 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，可是我没有找出B的错误，谢谢大家啦！

genius_ivan

首先应该搞清楚并列的关系：

and 前后要尽量对称，doing + n + adv + adj and doing + n + adv + adj,两个doing 共同作伴随状语

我今天也做到这道题了，但是我选的是E,也没有想出原因来，望高人解答

sophiaruan

and 后面的动词应该和前面的making 平行