English Idioms (C)
Can't judge a book by its cover   Cannot judge something primarily on appearance.  Caught between two stools  When someone finds it difficult to choose between two alternatives.  Costs an arm and a leg  This idiom is used when something is very expensive.  Cross that bridge when you come to it  Deal with a problem if and when it becomes necessary, not before.  Cry over spilt milk   When you complain about a loss from the past.  Curiosity killed the cat   Being Inquisitive can lead you into an unpleasant situation.  Cut corners  When something is done badly to save money.  Cut the mustard [possibly derived from "cut the muster"]  To succeed; to come up to expectations; adequate enough to compete or participate