A good student is honest and kind to others. In other words he never his friends.A. help

问题补充：

A good student is honest and kind to others. In other words, he never his friends.

A. helps

B. laughs

C. betrays

D. blames

答案：

A. helps

B. laughs

(答案→)C. betrays

D. blames

解析：考查词义辨析，help帮助，laugh嘲笑，嘲笑某人应用laugh at, betray背叛，blame责怪，句意：一个好学生对其他人诚实友好。换句话说，他从来不背叛朋友。故选C。