a class competition about
一场关于
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Miss Guo is reading a book to prepare a quiz for a class competition about the oceans.
郭老师正在看一本书，准备在班上做一个关于海洋的小测验。
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Students will have a free discussion in their class in the morning. They can talk about their study or have a debate competition.
学生早上可以在班级里自由交流，他们可讨论自己的学习或者举行辩论赛。
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