Your bag is smaller than .
Everybody is here ______ Jim Green. [ ]
Do you know the man is reading the book over there? —Yes, he’s Mr. Green, our PE teacher.
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.
I ______ go to bed until my father ______ back. [ ]