English is a language shared by several diverse cultures each of uses it somewhat differ

问题补充：

English is a language shared by several diverse cultures, each of uses it somewhat differently.

A. which

B. what

C. them

D. those

答案：

(答案→)A. which

B. what

C. them

D. those

解析：考查非限制性定语从句。，从句由限定词（分数/百分数/不定代词等）+of+ 关系代词which/whom+...表示整体与部分的关系。因为先行词为cultures，指物，故用which.关系代词在从句中既起替代作用又起连接作用。本题也用排除法，首先排除ＣＤ，因为them，those只能起替代作用，不能连接主从句。不是引导词。然后可以排除what,what不能引导定语从句。