— Are you Kate? — _____. I'm Lucy. A. Yes, I am B. No, I'm C. No, I'm not
We're tired because we have ________ yin.
Do you think ________ necessary to take the second turning?
I try to eat junk food only once a month _____ I love it.
_______ homework, we do their homework on Sunday.
---How often are the Olympic Games held? ---_____four years.