Question: what are the 10 examples of idiomatic expression?
Answer: “Hit the hay.” “Sorry, guys, I have to hit the hay now!” ... , “Up in the air” ... , “Stabbed in the back” ... , “Takes two to tango” ... , “Kill two birds with one stone.” ... , “Piece of cake” ... , “Costs an arm and a leg” ... , “Break a leg”