Ответы и объяснения

We used to be friends a long time ago.
I used to know you when you were young.
I used to play the piano.
You are different than you used to be.
She used to speak a lot when she was a child.
I’m glad to see you today.How are you?        Are you ready to start?Good morning, dear teacher!We are glad to see you, too.We are fine, thanks.