完形填空Robertisfifteennow.Twoandahalfyearsagohecametotheci...
問題詳情：完形填空Robertisfifteennow.Twoandahalfyearsagohecametothecityand__1__tostudyinamiddleschool.Hestudieshardand__2__hisclassmates.Andheoftenhelpshisfriends__3__lessons.Butashecomesfromavillage,th...