—Why do you look so tired?—Because we ________ for three hours without stopping.
—You’renewhere,______? —Yes,I’mfromDujiangyan.Icameherelastweek.
IamnotsureifTom____home.Ifhe________, I'llcallyou.
It_______me15minutestogettoschoolonmy bike.
------Whyareyouso________? -------Iamwatchingan_______basketballmatch.
The math problem is too difficult ,I can’t__________ .