她非常努力地尝试了，但她不够快。

She tried very ___hard but she wasn't quite fast enough.

如果你想通过这门课，你就必须更加努力。

You'll have to work ___harder if you want to pass this class.

我不喜欢在教室里非常努力地工作。

I don't like to work very ___hard in the classroom.