1 sc

zyh79

Temporary-employment agencies benefits not only from the increasing demand for clercial workers but also( from highly paid profits made in placing highly paid professinals,requests for whom) have increased in the recent wave of corporate takeovers.
括号内为答案，问题是requests....是什么成分？有没有这种定语从句啊？

zyh79

就是一般的非限制性定语从句；
平时，对sth. of which/ whom。。。的比较熟悉，换了一个介词到不认识了，郁闷。

zyh79

现在发现没认出来的原因是由于requests，不是for,
非限制性定语从句中，好像n.+prep+which/whom的情况少见，
常见的是  pron.+prep.+which/whom