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。