Some students often drop litter carelessly in our school. What can we do?- We can _______ some signs to remind them not to do that again.

These days all China is worried about the plane of MH370.—Yes. All the world wants to know________________.

Nancy, I bought you a new car, an Audi A8. —Thank you, dear. It’s _____ what I want.

My brother got fired a month ago, but he landed on his feet and found another job that paid ____ money.

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.