—_____ do you go to the zoo with your brother? —Three times a month.
—Asamemberofbusdrivers,IamproudofWuBin. —___________.Heisaheroinmyheart.
—Doyoubelievethatpaperismade_______wood? —Yes,Ido.Andyoucanseethatbooksaremade________paper.
—Doyouknow________thisafternoon? —I'mnotsure,butI'lltellyouassoonasshe________.
Ifthereis______pollution,theairinourcitywillbe ________dirtier.
BythetimeIlockedthedoor,IrealizedI________mykeysathome.