Air quality in our city is becoming worse and worse. – Yes. These days’ PM2.5 readings are frightening. We must do something to _______ air pollution.
Why does Tommy look excited ? — Because he can’t wait ______ part in the basketball match.
We have friends to help us fight against pollution, and trees are one of ________.
Who is the most ___________ student in your class?—I think Jimmy is. He is very out going, helpful and creative.
Mike. Is that smart phone___________?—- Yes. My mother bought it for me yesterday.