Lily Sam likes popular songs, so they went to Zhou Jielun’s concert together last night.
—What are you in? —I’m in Three. A.class, class B.class, Class C.Class, Class
—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.
—Why do you like living in the countryside? —Because there’s _______ noise and _______ cars there.