Cat got a tongue            
          : Can't speak / talk (for any reasons)

Call down
          : Curse someone / something

Call the roll
          : Call out to check the total number

Chance it
          : Take a risk / Take a chance to try

Come off
          : Succeed

Come to pass
          : Happen / Occur

Come in handy
          : Become beneficial

Count on
          : Trust / Reply on

Confide in
          : Trust someone enough to tell the secret or personal story

Count towards
          : Approve that something is correct / becomes effective

Can't get a word in edgeways
          : Have no chance to say anything

Can't make head nor tail
          : Cannot understand something

Caught between two stools
          : You have to choose between two difficult options

Chip on the shoulder
          : Still angry from something in the past

Catch some rays
          : Walk/ sit under the sun

Can't take a chance
          : Can't take a risk

Cold Sweat
          : Feel very nervous of something