You should know by heart all these idioms.
Cross my heart, I’m telling the truth.
He wears his heart on his sleeve.
She’s had her heart broken before.
He is the heart and sole of the team.
I’d be there in a heartbeat if you need me.
They’ve got their hearts set on that house.
CLICK HERE for my “Everyday Verbs Songs” and Worksheets
image from http://englishstudyhere.com