举个例说吧，有一天，在上课之前，他在黑板上写了一大串家庭作业题目，大家都以为是老师布置的作业。

For example, one day before class, he put a long homework assignment on the board and made us think that the teacher had given it.

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老师常把最好的作业钉在黑板上。

The teacher usually pins up the best work on the board.

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老师常把最好的作业钉在黑板上。

The teacher usually pins up the best work on the board.

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