BobwasborninCambridge. Whenhewasinelementaryschool,h...
问题详情： BobwasborninCambridge. Whenhewasinelementaryschool,heaskedhismothertotakehimtoparksintheircommunitysohecouldcollectemptysodacans(罐)torecycle. Hismotheragreed,aslongashesavedpartofthem...