One of our rules is that every student wear the school uniform while at school.
A. might
B. could
C. shall
D. will
网友回答
A. might
B. could
(答案→)C. shall
D. will
解析：句意：四个规定之一是每个学生在校期间应该穿校服。Shall可以用于第二，第三人称表示“规定，命令，警告，允诺”，might“可能，可以”，could“能够”，will“将会”，选C。