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
• whose cost will raise water bills high enough so that

答案选D我选了A，哪里说过whose没有限定修饰人？非常不解阿...

引导非限制性定语从句多用 whose，而很少用表示所属关系的介词 of 加上关系代词 which。如：
   There is a mysterious lake at the foot the hill , whose depth has never been
measured . 山脚下有个神秘的湖，其深度从未测量过。

of which 常用来表示整体与部分关系。

There are 102 elements found in nature , of which most are metals .

以上是我的愚见。这个题目真的很搞。

Of which 和 whose 在现代英语里面是通用的。我的改稿人还是坚持只把 whose 应用在人的身上，但我则不那么讲究。

A 错不是因为用了 of which，而是因为有错误。

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.

第一个错误：在 projects 后要有逗号，不然就不能用 of which。

第二个错误：raises water bills high enough so that 应该是 raises water bills so high that，像 D 那样。

选项c呢？错在哪里？

C 明显的错误是 which，那里应该是用 that 的。另外就是 high enough 的 enough 不应该在这里用，那是用词不够严谨。

弱问 B为什么错  当时 enough马上排除了  然后BD理所当然的 选了B。。。。

B 是这样的：The city has proposed a number of water treatment and conservation projects at a cost raising water bills so high that even environmentalists are beginning to raise alarms.

错在 raising water bills，这个词组是形容 cost 的，所以必须在这里用 relative clause，不然 raising 就没有主语。所以应该改成 at a cost that raises water bills  . . . 。当然，就算如此，也是很臃肿的一句，一点也不好。

非常详细，谢谢！

。。。。。发现我一个  一直没有搞清楚的语法点。。。。
原来在宾语从句中充当主语的先行词是不能省略的。。。。。。


万分感谢