--Excuse me, may I smoke here?--I’m afraid you____. It’s not allowed here.A. can B. can’t C. needn’t
—Doyouknow________thisafternoon? —I'mnotsure,butI'lltellyouassoonasshe________.
Ifthereis______pollution,theairinourcitywillbe ________dirtier.
BythetimeIlockedthedoor,IrealizedI________mykeysathome.
—________ English movies is helpful to learn English. —But I find _______ hard to understand when the people speak fast.
—_____Ifinishmyhomeworknow? —No,you_____.Yourworkisovertoday.