Aprofessortoldhisstudentstogointothecityslum(贫民窟)tostud...
问题详情：Aprofessortoldhisstudentstogointothecityslum(贫民窟)tostudythelifeof200boys．Heaskedthemtowritereportsabouteachboy’slifeandfuture．Everyoneofthestudentswrote，“Hedoesn’thaveanyhope．” Twenty-...