Question tags + reply questions

You have forgotten to post my letters, ___________ ?

No matter what we do, nothing will change, ________ ?

Lisa can lend you some money, _________ ?

Don't get lost, _______ ?

I'm your best friend, aren't ___?

You aren't well, ______?

Dad is coming, _____?

Stella and George weren't happy, _________?

A: We want to go shopping.

B: Do ____?

A: The supermarket was closed.

B: _____ it?