—You look so nice today! — ____________.A. No, I don’t B. Thank you C.You’re right
—Do you know him? —I’m sure I’ve seen him _____, but I can’t remember the right place.
What can we students do _____ the environment?
—How long have you lived in this town? —_____ 2001.
There are five people in the room, but I know _____.
Don’t give up _____ you will never succeed.