（4） Adhesives， such as glue， tape and gum， vary with the purpose —— intended.

（A） they were for

（B） for they were

（C） which were they

（D） for which they were （93.10）

D for which指代for the purpose.

4. What 引导的名词性从句 解题要点：what兼先行词和关系代词双重身份，即what = the thing （things） that 。因此考生应特别注意，what既已包含先行词在内，它的前面就不应该再出现先行中心名词。What 与that 的区分是TOEEL常考题目

全真例题分析

（1） During the eighteenth century， Little Turtle was chief of the Miami tribe whose territory became —— is now Indiana and Ohio.

（A） there

（B） where

（C） that

（D） what （93.5）

D what = the area that.What所指代的是地点、位置。然而，此句却不可选择（B）where.因为关系副词where不能作从句的主语。只有what即是先行词又是关系代词。

（2） The chief foods eaten in any country depend largely on —— best in its climate and soil.

（A） it grows

（B） what grows

（C） does it grow

（D） what does grow （90.1）

B what grows = the thing that grows 另请注意：介词后面通常不能接that引导的从句，