【题文】OneafternooninJanuaryin1998,SusanSharp,43,andher8-year-oldsonDavid,werewalkingacrossanicysquare,whenSusan'scane(手杖)slippedontheice
Herface36firstintothemud
David37hermother'sside,“Areyouallright,Mom”38,Susanpulledherselfup,“I'mokay,Honey,”shesaid
Susanwasfallingmore39sinceshehadtroublewalking
Everyinchoficewasa40dangerforher
“IwishIcoulddosomething,”theboythought
David,too,washaving41ofhisown
Theboyhadaspeechproblem,soatschoolhetalked42
Oneday,David'steacherannounceda43homework
"Eachofyouisgoingtocomeupwithan44,"shesaid
Thiswasfor"INVENTAMERICA",anationalcompetitiontoencouragecreativityinchildren
Anidea45Davidoneevening
Ifonlyhismother'scanedidn'tslipontheice
“WhatifI46yourcanetoanailcomingoutofthebottom”heaskedhismother
“47thesharpendwouldscratch(划破)floors,”Susansaid
“No,Mom,I48makeit