Question

This is the only article _____ was written by him.

A．who

B．whom

C．which

D．that

Answer 1

D

试题分析：考查定语从句：先行词是物，定语从句中缺少主语，一般用that或which引导定语从句，因为先行词被the only修饰定语从句只能用that引导，句意：这是他写的唯一一篇文章。选D。
点评：定语从句的考查主要就是考查关系词的辨析，关系代词that, which, whose, whom, as， who在句中做主语，宾语，表语或者定语；where, why, when在句中做状语。要分析句子成分，看缺少什么成分，就选用相应的关系词。这里考查的是只用that，不用which的情况，当先行词被the only，序数词，最高级，不定代词或是不定代词的时候，定语从句用that，不用which引导。