He can’t the difference between right and wrong.A. sayB. speakC. answerD. tell

问题补充：

He can’t the difference between right and wrong.

A. say

B. speak

C. answer

D. tell

答案：

A. say

B. speak

C. answer

(答案→)D. tell

解析：A.说话B.讲C.回答；句意：他不能分辨出对和错的差异。固定词组tell the difference between A and B“说出A和B的不同之处”。此处tell意为“辨别，判断”。故选D.