The initial idioms of the letter C

Could I help you?	Could I join you?
Could I leave a message?	Could I see you again?
Could I see you in my office?	Could I speak to?
could in sleep	knock (someone) down with a feather
knock (someone) over with a feather	can't be bothered
couldn't get elected dogcatcher	couldn't carry a tune in a bucket
couldn't happen to a nicer (person)	(someone) could sell ice to Eskimos
could standing on head	could talk under water
could with eyes closed	Could you excuse us, please?
Could you hold?	Could you keep a secret?
coulda, woulda, shoulda	couldn
couldn't [act] way out of a paper bag	couldn't ask for more
couldn't be better	couldn't be happier
couldn't believe eyes	couldn't care less
not care twopence	couldn't carry a note in a bucket