One of our rules is that every student wear school uniform while at school.A. mightB. coul

问题补充：

One of our rules is that every student wear school uniform while at school.

A. might

B. could

C. shall

D. will

答案：

A. might

B. could

(答案→)C. shall

D. will

解析：考查情态动词。句义：其中一项规定就是每个学生在学校必须穿校服。根据关键词rules知道这是按规定，shall的具体用法：一三人称的疑问句，表征求对方意见；二三人称的陈述句表允诺，威胁，命令，警告等，还有就是按规定（制度，法律，协议等），所以C正确。