Using multiple dropdowns on a single slide

Greetings!

I'm trying to develop a slide (or if necessary, multiple slides that look like a single slide) that includes multiple drop downs. The idea is that students would have to select appropriate fields for a letter salutation, subject line, signature line, etc. Anyone have tips on how to accomplish this? It doesn't need to be scored per se, but I would like to be able to indicate whether the selected responses are right or wrong. Thanks!