Two words are homonyms if they have the same pronunciation but are spelled differently and have different meanings. In this section, we're going to break down the different types. 

You will hear:

M1: Eugene missed a lot of classes last week.
F1: That's because he was sick. I think he had the flu.

What is learned about Eugene?

The dialog contains the word week, meaning a seven-day period. Choices (A) and (C) refer to a homonym of that word, weak, which means "not strong." The dialog also contains the word flu, an illness similar to a bad cold. Choice D refers to a homonym of that word, flew (took a trip by plane).