I think I must've missed the post where you described your class.  Is it just an introductory language course?  Why is there a test?  So you can move onto an intermediate course?  Is it taught by the same woman?  Sorry for so many questions :)

ANYWAY, perhaps your teacher wanted you to be able to converse and ask questions and order food because those are the skills you need to succeed, and she knew that the test really isn't all that important, but you have to take (and pass!) it anyway, so what's the harm in helping you along a little bit?

Sounds like you're doing well!  Post some pictures!