Once we discover a mistake, we should not ______ it but correct it immediately, to create better conditions for economic development.

Hey guy, turn it off please. We don’t __________music in the reading room. —Oh ,sorry!

The lake looks in the moonlight and we can hear insects (昆虫) sing .

This is my present for you. — Oh, I _______ you would give me so nice a present.

name is Lily.am twelve.