Hit the nail on the head
Good luck!
Cat got your tongue
Don't cry over spilled milk
Piece of cake
Agree with someone
Rarely
You got it!
Don't get upset over the little things
Break a leg
Tie the knot
To get married
Cost an arm and a leg
It was expensive!
Once in a blue moon
Cold shoulder
That was easy!
Under the weather
Feeling sick
Let the cat out of the bag
I am speechless
Seeing eye to eye
Told a secret
To ignore someone