why do we need to study english?

And now, an discussion exercise for you, the readers:

Which of the following are grammatically incorrect and/or stylistically displeasing words to fill in Keep (subject optional) _________?

-alive
-warm
-cold
-beautiful
-quiet
-loud
-healthy ~ iffy
-rich
-full
-empty
-busy
-free
-happy
-sad

"stay" works a lot better for most of these, I think.

Edit: I only considered "Keep" <word>, I didn't add a subject for any of them.