Concentrators in geological sciences elect either geology or geography.

主地质学的学生要选地质学或地理课程。

Is English an optional lesson, or does everyone have to learn it?

英语是选课还是每的课程？

There are four options in our college.

我们大学里有四门选科。

Taking these courses profited him.

选这些课程对他有好处。

"If you want to ensure that you get the diploma, you have to work harder and take all these curricula and pass them."

"如确保获得文凭,就得努力些,选所有这些课程并通过考试。"