【原创】 Vehicles, coal-burning, airborne dust and industrial production ______85 to 90 percent of the major airborne pollution sources in most Chinese cities, the newest research shows.
—I think everyone has a role to play in making the planet a better place. —Yes, indeed. ______.
_______was not ______she took off her dark glasses _______I recognized her.
The days we look forward to ____at last.
Determination is a kind of basic quality and this is ________ it takes to do jobs well.
_________ the flight to New York will be delayed is _________ I’m especially worried about.