老师在黑板上清楚地写下了作业要求。

The teacher ___stated the homework requirements clearly on the blackboard.

老师在课堂上清楚地陈述了考试规则。

The teacher clearly ___stated the exam rules in class.

请在文件顶部清楚地写明你的联系方式和日期。

Please clearly ___state your contact information and date at the top of the document.