Students should to smoke.A. not be allowedB. be not allowedC. not allowD. be allowed

问题补充：

Students should to smoke.

A. not be allowed

B. be not allowed

C. not allow

D. be allowed

答案：

(答案→)A. not be allowed

B. be not allowed

C. not allow

D. be allowed

解析：考查allow的用法。句意“学生不应该被允许吸烟。”students和allow之间是被动关系，应该用被动语态，排除C；not放在be之前，排除B。句子表否定。故选A。