This is the only one of the students the truth.A. that knowsB. that knowC. who knowD. whi

问题补充：

This is the only one of the students the truth.

A. that knows

B. that know

C. who know

D. which knows

答案：

(答案→)A. that knows

B. that know

C. who know

D. which knows

解析：句意：这是唯一一个知道真相的学生。通过分析句子结构，可知这个句子中包含一个定语从句，先行词是one of the students，指人，且one of the students，谓语动词用单数，选A。