1. Temporary-employment agencies benefit not onlyfrom the increasing demand for clerical workers but also the higherprofits made when highly paid professionals are placed， requests forwhom have increased in the recent wave of corporate takeovers.
　　（A） the higher profits made when highly paid professionals are placed， requests for whom
　　（B） the higher profits that are made in the placement of highly paid professionals， requests for whom
　　（C） from the requests for highly paid professionals， who make higher profits for the agencies when placed and whose requests
　　（D） from highly paid professionals， whose placement makes higher profits for the agencies and whose requests
　　（E） from the higher profits made in placing highly paid professionals， requests for whom

答案选E. 但是有点不明白是E选项后面 requests for whom是定语从句还是单独的一个句子？谢谢！！

Temporary-employment agencies benefit not only from the increasing demand for clerical workers but also from the higher profits made in placing highly paid professionals, requests for whom have increased in the recent wave of corporate takeovers.

在逗号之后的是个 relative clause，用 whom 来与前面的 professionals 连接起来。Relative clause 不一定是以 relative pronoun 开头的，像这句话里面的 requests for whom  也是常有的。总之就是如果 relative pronoun 是介词的宾语，就不是用 relative pronoun 来开始的。

从句吧，修饰前面的高新的什么什么

requests for whom。。。这句话不是定语从句或其他从句，是一个进一步说明的分句。
whom指代highly paid professionals。
requests for whom have increased 。。。就是高薪专业人士的需求已经增加。
but also 后面的句子意思是，中介也从安排高薪专业人士中牟取暴利，高薪专业人士的需求最近在企业招聘中已经增加。

[ 本帖最后由 taidai 于 2008-7-5 03:13 编辑 ]