I got a 100 on a grammar test even though we hadn't learned what a conjunction was yet and five of the questions were about conjunctions. But, I'm smaht and can sound out words and know that conjunctions join things.
Your Language Arts Grade: 100%
Way to go! You know not to trust the MS Grammar Check and you know "no" from "know." Now, go forth and spread the good word (or at least, the proper use of apostrophes).