How do most old women exercise in the neighborhood?--________dancing in the square together.
—Can you tell me__ __? — He is kind and generous. He always helps others.
—Do you know ______? — A reporter, I think.
— Do you know in ancient China? — I have no idea. But I know people once used tree leaves to make paper.
Computers are so popular in our country that every pupil knows _____ e-mails.
—Mom, shall we go hiking tomorrow? —Oh, dear. That depends on it is fine tomorrow.