If you feel tired, you may stop .
Mr. Green told us _____ turn the lights off when we leave the classroom.
Will you write a report ____ the wild animals ____ danger for the newspaper?
We must hurry up. We only have few minutes _______.
—Now lots of teenagers spend a lot of time playing computer games. —Yes. Teachers and their parents should prevent them ____________ too much.
Is Zhalong one of the world’s ________?