All the students to inform their parents the mid-term exam results.
A. require; of
B. are required; of
C. require; about
D. are required; on
网友回答
A. require; of
(答案→)B. are required; of
C. require; about
D. are required; on
解析：考查动词固定搭配；固定搭配require sb to do sth要求某人做某事；inform sb of sth通知某人某事；本题是一个被动语态的形式；句意：所有的学生都被要求把期中考试的成绩通知自己的价家长。故B正确。