There are so many foggy days these days. We all wonder .A. how is the air polluted B. why the air is polluted seriouslyC. what are the real reasons
—I’m in Class 4. Are you in Class 4, ____? —Yes, I am.
—Is her name Kate? —____
—____ is she? —She’s fine.
—What’s that ____ English? —It’s a desk.
These are two ____ and three ____.