◆ 疯狂操练
It is required that every student (should) wear a school uniform.
（所有学生都要求穿校服。）
◆ 疯狂实战
A: It is required that everyone (should) attend the meeting.
B: Damn it! I wanted to leave early this afternoon.
A: 所有人都被要求参加会议。
B: 气死我了！我想今天下午早点走呢。
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