【问】 Author Edith Wharton thoroughly understood the society____.
 A. she had grown up B. which had she grown up in
 C. in which she had grown up D. she had grown up in it(TOEFL，87.5)
 我初学英语时就已牢记the house in which I lived和the house which I lived in(我住过的房子)这两个结构都是正确的。但上面试题的命题者却把B判为错误，这是我无法理解的。而且我从CGEL中查到了后一结构的例句：
 the table(which) the boy crawled under
 男孩在下面爬的那张桌子
 【答】 在定语从句中，当关系代词which作介词的宾语时，从语法上说，既可以把介词放在which之前，也可以放在which之后。但是，把介词放在关系代词之前(in which，to whom)的结构是正式语体。在上面的试题中之所以不能选B，并不是因为介词in放在了which之后，而是因为主语和谓语的语序不对。如果把had放在主语she之后，那末，选B也就是正确的了(但多用于非正式语体)。请对比下列例句：
 1. The documents for which they were searching have been recovered. (Chambers)
 他们寻找的文件已经找到了。
 2. This is a subject about which we might argue for a long while. (Sinclair)
 这是一个我们可能要争论很长时间的问题。
 3. The earliest kind of desk was box that had a sloping lid，under which there was storagespace for writing materials.
 A. a sturdy B. a polished
 C. an inclined D. an adaptable (TOEFL，84.11)
 4. This is the room(which) Churchill was born in.
 这是邱吉尔出生的房屋。
 5. She spent all evening talking about her latest book，which none of us had ever heard of.(PEU)
 她花了整个晚上谈她最近的新书，关于这本书，我们没有一个人听说过。
 但是TOEFL等测试专家只承认正式语体的用法为正确用法。因此，我们在TOEFL试题中所能查到的，都是介词+which的用法，而无which...+介词的用法。请考察下面的实例：
 1. The extent of the harmful effect of locoweeds on animals depends on the soil____theplants grow.
 A. which B. which in
 C. in which D. in(TOEFL，90.5)
 2. Dams can be very beneficial to the areas____.
 A. in which they are built B. building them where
 C. which they are built D. where are they built (TOEFL，87.8)
 3. Janet Collin’s struggle to make a place for herself in ballet is the kind of life story____a fascinating novel might be written.
 A. of B. by
 C. for whom D. about which (TOEFL，89. 3)
 4. Detergents vary in composition depending on the cleaning task____intended.
 A. which they B. for which they are
 C. they D. which are they(TOEFL，81. 1)
 5. Hundreds of wildlife refuges have been estabhshed throughout North America to prov-ide animals with a safe place which to live. (TOEFL，87.12)