每周三下午我们有两节关于生物学的讲座。

We have two ___lectures on biology every Wednesday afternoon.

教授每周三下午在礼堂讲座。

The professor ___lectures in the auditorium every Wednesday afternoon.

老师就他抄袭作业的事情长篇大论地训斥了他。

The teacher ___lectured him at length about copying homework.