Which is a pronoun case and why

20a. My best friend and I are going to Hawaii this summer.
20b. My best friend and me are going to Hawaii this summer.

5 answers

Ahh -- you're doing an Axia test!!

We'll be glad to comment on your answer.
20a is correct
My best friend and I are going.....
Sorry, Ms.Sue, when I posted my answer, yours didn't show up on my computer yet, or I would not have answered that post.
That's o.k., E.G. It's tempting to answer these easy questions. :-)
Thank you, Ms. Sue!