为什么你应该考虑在大学里修一门人口学的课程呢？
Why should you consider taking a course in demography in college?
我们希望每位新生修一门理科课程。
我知道我去年错修了一门课程。
我正打算修一门理科课程。
他本打算修一门管理课程，但从那以后他又放弃了。
He had planned to do a management course but since then he had thrown it up.
他本打算修一门管理课程，但从那以后他又放弃了。
He had planned to do a management course but since then he had thrown it up.
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