Why unit 4?

For the final exam I ave chosen unit 4: money. In tis unit I want to learn some vocabulary about luxuries and money, I think that this may be interesting. Grmmar is about willand be going to and I'm happy to do this tense because I have only done present, past and a little bit the past perfect bt never the future and I haved like to do a new part of the language becaus I hate repeating the same thing every year.