Wow,ingenious and testing

Very good and hard to get in the time. I think there is an unintentional pitfall in that muck and check could both be followed by either up or in so the groups are not entirely mutually exclusive. Also I put in but was marked incorrect. But still very entertaining.

Toast, well dhur!!

Too many permutations. Also, it's possible to produce variant correct rows, and still have 4 correct rows.

What alternative group of four contains 'tools'?

4 x opposing prefixes & suffixes. How novel.