问题
选择题
In order to keep our students safe, strangers ________before entering the school yard.
A. will check B. will be checked C. checked
答案
答案：B
考查动词的语态。句意“为保证学生的安全，陌生人在进入校园之前将会被检查。”strangers和check之间是被动关系，应该用被动语态。故选B。