Aprofessortoldhisstudentstogointothecityslum(貧民窟)tostud...
問題詳情：Aprofessortoldhisstudentstogointothecityslum(貧民窟)tostudythelifeof200boys．Heaskedthemtowritereportsabouteachboy’slifeandfuture．Everyoneofthestudentswrote，“Hedoesn’thaveanyhope．” Twenty-...