Students are asked to themselves in this boarding school and they are only allowed to go

问题补充：

Students are asked to themselves in this boarding school and they are only allowed to go back home once a week.

A. act

B. behave

C. perform

D. observe

答案：

A. act

(答案→)B. behave

C. perform

D. observe

解析：词义辨析。A. 行动，扮演 B.表现，使守规矩 C. 执行，完成 D. 观察，注意。句意：在这所学校应该要求学生们让自己守规矩……，故选B。