In order to keep our students safe strangers before entering the school yard.A. will chec

问题补充：

In order to keep our students safe, strangers before entering the school yard.

A. will check B. will be checked C. checked

答案：

解析：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。