求助 GWD 7-15

emilzhu750

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.

 

1. the cost of which raises water bills high enough so that
2. at a cost raising water bills so high that
3. at a cost which raises water bills high enough so
4. whose cost will raise water bills so high that

   E     whose cost will raise water bills high enough so that

B为什么不对啊

whiteshadow

是选D么？

 B少了一个从属的关系，貌似有些改变原来的意思，有些模糊。

emilzhu750

我觉得whose有点指代不明？可以一下字指代water treatment and conservation projects 么》

初夏的味道

同问哦