---Did you talk back to your mother when you were a child?---Yes. But now I realize I was wrong. I really regret ___________that silly thing to my mum.
What’s that Chinese?
--- do you spell the word pen?---P-E-N.
--- , is this your ruler?---Yes, it is. Thank you.
--- _____! Where is my cup?---_____, I don’t know.
--- Is that your backpack?---_____ . That’s his backpack.