In which sentence is all CAPITALIZATION correct?

If I .......................... you, I would take a year off before starting university.

Which one or the underlined words or phrases is INCORRECT? One of the questions on the test were very easy, but the rest…

If I ................... this course, I will not be able to take the math course as well.

In which sentence is all CAPITALIZATION correct?

People over forty need -------------- regular check-ups at least once a year.