--As we know,China is still a _________ country while the U.S.A. is a _________country.A.developing;developed B.developed;developing C.developed;developing
—Could you please tell me how to get on well with my schoolmates? —________
She ________ speaking in front of many people because she is so shy.
—Must we keep the window _______ all the time? —No, you don’t have to.
We _______ play on this road. There is too much traffic.
The old man was _______ sad _______ say a word when he heard the bad news.