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 begining to raise alarms.
B. at a cost raising water bills so high that
D. whose cost will raise water bills so high that
偶知D是正确答案,请问B错在哪里?谢谢!!!!!
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gwd 7-15 http://forum.chasedream.com/dispbbs.asp?boardID=23&ID=57127&page=1
http://forum.chasedream.com/dispbbs.asp?boardID=23&ID=48167&page=1
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