The school rule states that no child shall be unless by an adult allowed out of the scho

问题补充：

The school rule states that no child shall be, unless by an adult, allowed out of the school during the day.

A. was accompanied

B. accompanying

C. accompanied

D. being accompanied

答案：

A. was accompanied

B. accompanying

(答案→)C. accompanied

D. being accompanied

解析：考查从句的省略式：unless accompanied=unless the child is accompanied by an adult，句意是：学校规定说，没有孩子在没有成人的陪伴下可以在白天出学校。选C。