I'm just starting, still on the Mandarin Survival, but it would be fun to occasionally be tested on a short sentence comprised of the words I've learned. That could give me a feel for how sentences are put together and how the individual words sound when spoken together. It would also make what I've learned feel more useful and I'd have phrases that I could try out on the Chinese people I know. I've learned already that saying a single word with no context makes it hard for them to know which word I'm trying to pronounce. An additional bonus would be that I think it would add quite a bit harder challenge to the quiz.