required page end character

例句：

1. 1. Allstudents are required to attend the meeting.
   所有学生都必须参加会议。
2. 2. The teacher required us tofinish our homework before class.
   老师要求我们在课前完成作业。
3. 3. It is required thatall participants sign a waiver form.
   所有参与者都需要签署一份免责声明。