ThefirsttimeIremembernoticingIremembernoticingthecrossingguardwaswhenhewavedtomeasIdrovemysontoschool.He16mewithapuzzle----allbecausehewavedtomelikesomeonedoes17seeingaclosefriend.Abig,18smi

　　ThefirsttimeIremembernoticingIremembernoticingthecrossingguardwaswhenhewavedtomeasIdrovemysontoschool.He16mewithapuzzle----allbecausehewavedtomelikesomeonedoes17seeingaclosefriend.Abig,18smileaccompaniedhiswave.ForthenextfewdaysItriedto19hisfacetoseeifIknewhim.Ididn’t.Perhapshehad20meforsomeoneelse.BythetimeIcontentedmyselfwiththe21thatheandIwerestrangers,weweregreetingeachotherwarmlyeverymorninglikeoldfriends.

　　Thenonedaythe22wassolved.AsI23theschoolhewasstandinginthemiddleoftheroad24hisstopsign.Iwasinlivebehindfourcars.25thekidshadreachedthesafetyofthesidewalk,heloweredhissignandletthecars26.Tothefirsthewavedand27injustthesamewayhehaddonetomeoverthelastfewdays.Thekidsalreadyhadthewindowdownandwerehappilywavingtheirreply.Thesecondcargotthesame28fromthecrossingguard,andthedriver,astiff-looking（表情刻板的）businessman,gaveabrief,almost29waveback.Eachfollowingcarofkidsontheirwaytoschool30moreheartily.

　　EverymorningIcontinuedtowatchthemanwith31.SofarIhaven’tseenanyone32towaveback.Ifinditinterestingthatonepersoncanmakesucha（n）33tosomanypeople’slivesbydoingonesimplethinglikewavingandsmilingwarmly.His34armedthestartofmyday.Withafriendlywaveandsmilingfacehehadchangedthe35ofthewholeneighbourhood.

　　16.A.hit B.disappointed C.presented D.bored

　　17.A.on B.from C.during D.about

　　18.A.false B.shy C.apologetic D.bright

　　19.A.research B.study &n