一道语法题

sophialy2008

Q15:
The city has proposed a number of water treatment and conservation projects the cost of which raises water bills high enough so that even environmentalists are beginning to raise alarms.

A.    the cost of which raises water bills high enough so that
B.    at a cost raising water bills so high that
C.    at a cost which raises water bills high enough so
D.    whose cost will raise water bills so high that
E.    whose cost will raise water bills high enough so that
答案是E 为什么不选B 呢？

张大猴

我理解的是，（1）动词优于动名词，所以will raise比raising好

（2） treatment and conservation projects  at a cost ...

at a cost 是修饰conservation projects  还是整个treatment and conservation projects  呢，造成了歧义