How grammatically correct are you?

You are a GRAMMAR GOD!

Congratulations! If your mission in life
is not already to preserve the English
tongue, it should be. You can smell a
grammatical inaccuracy from fifty yards.
Your speech is revered by the underlings,
though some may blaspheme and call you a
snob. They're just jealous. Go out there
and change the world.

How grammatically correct are you? (Revised with answer key)

Gald to know my English is not that bad. Though I have no idea y I fall into this catagory when a check thru the answer showed that I didn't do too well. Well, at least it made me feel good.