I must attend a lecture.

我要去听一个讲座。

Where is she going? -to attend a lecture.

她到哪儿去？去听演讲。

Thanks teacher, we have known, we will attend a lecture well.

谢谢老师，我们知道了，我们会好好听课的。

What if she will not attend a lecture you do not really have to discipline.

如果她什么都不会又不听课你确实是要管教的。

You might attend a lecture, enroll in a course, or browse through a bookstore.

你可以去听听讲座，参加课程或在书店浏览书籍。