Which one of these passages would be part of an expositiory text?

answer: passage 2

explanation:

Go to the teacher, and have a little nice friendly talk.  Point out that you just joined the class, so of course you don't have the current assignment ready, simply because it was already in progress when you arrived.  Ask her for some reading that you can start doing now, to start learning the subject that everyone else was working on before you arrived.