Accordingtoanewsurvey,students’safetyhasbecomeabigproblem.Nearly50%ofstudentssaytheyareworriedaboutrobbery(抢劫)onthewaytoandfromschool.NowinmainbigcitiesinChina,someschoolshavetaughtstudentsanunusuallesson:self-protection.Studentslikethislessonbecausetherearenoexamsorboringclasses.Andtheycanlearnhowtosavelivesandknowhowtostopdangerbeforeitreallyhappens. | |||
A.①② | B.②③ | C.①②④ | D.①③④ |