---What will you do if it _____ rain tomorrow? --- I’m not sure.
_____ of the water _____ polluted. We must try to protect our environment.
Pleasetellme______.Ihavesomegoodnewsforhim.
—You’renewhere,______? —Yes,I’mfromDujiangyan.Icameherelastweek.
IamnotsureifTom____home.Ifhe________, I'llcallyou.
It_______me15minutestogettoschoolonmy bike.