Haha don't be mean to the course contributors and write things in poetic English. They have to think of all the possible correct answers and write them in manually, and that can be a long list without speaking poetically.
I tried that just for fun, but I knew it wouldn't be accepted. I would really only use it in a poem or a song. If you wrote it in an essay (for whatever reason) the marker would probably cross it out and write "Don't be shy."