Body parts
Animals
100

Before an exam your parents told you... to tell you good luck

Break a leg

100

When you are quiet

Cat got your tongue?

200

Expression use to say that your daydreaming (not paying attention)

Head in the clouds

200

To tell a secret

Let the cat out of the bag

300

To be extremely kind and generous

Heart of gold 

300

When you solve two problems at one time with a single action

Kill two birds with one stone

400

When you agree with someone

See eye to eye

400

When you create a situation that will cause trouble to others

Open a can of worms

500
I love my mom more than anything in the world. She is the... 

Apple of my eye

500

When you admit you were wrong about something

Eat crow