This is the only article was written by him.A. whoB. whomC. whichD. that

问题补充：

This is the only article was written by him.

A. who

B. whom

C. which

D. that

答案：

A. who

B. whom

C. which

(答案→)D. that

解析：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。