- 問題詳情:I’mJohn.Ihavemanygoodfriendsatschool.Bobisoneofthem.Hishouseisn’tfarawayfromourschool.Heusuallygoestoschoolbybike.Aliceusuallytakesthesubwaytoschool.Ittakesher25minutestogettoschool.Herhouseis30kilometersfromtheschool.Sarahgoestoschoolonthe...
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