课前他们先给学生提供阅读材料和需要完成的测验，以便他们上课时准备好进行讨论。
They gave them readings and quizzes to finish before class so they would come prepared to discuss the material.
课前他们先给学生提供阅读材料和需要完成的测验，以便他们上课时准备好进行讨论。
They gave them readings and quizzes to finish before class so they would come prepared to discuss the material.
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