One of the rules is that every student wear school uniform while at school.A. mightB. cou

问题补充：

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

A. might

B. could

C. will

D. shall

答案：

A. might

B. could

C. will

(答案→)D. shall

解析：考察情态动词用法。Shall表示允诺，强制，命令；（或者法律规定要做的事情）；本题考察的正是法律规定中要做的事情。结合句意可知D正确。句意：其中有一个规则说：学生在校期间，每个学生都要校服。