gwd 7-15

winnie

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.

the cost of which raises water bills high enough so that

at a cost raising water bills so high that

at a cost which raises water bills high enough so

whose cost will raise water bills so high that（D）

whose cost will raise water bills high enough so that

各位大牛：为什么不选b？at a cost不可以吗？

LES

http://forum.chasedream.com/dispbbs.asp?boardID=23&ID=57127&page=1

LES

mm，在提问前可以先搜索一下。请参考置顶的汇总。

初夏的味道

b不可以么？