2010广东高考卷英语。第36个空填a行不行？有原文。
Ayoungman,whiletravelingthroughadesert，csmeacrossaspringofclearwater.____31____waterwassweet.Hefilledhisleathercontainersothathecouldbringsomebacktoanelder____32____hadbeenhisteacher.Afterafour-dayjourney,theyoungman____33___.(present)thewatertotheoldman.Histeachertookadeepdrink,smiled____34____(warm),andthankedhisstudentverymuchforthesweetwater.Theyoungmanwenthome____35_____ahappyheart.
Afterthestudentleft,theteacherlet__36___studenttastethewater.Hespititout,__37___(say)itwasawful.Apparently,itwasnolongerfreshbecauseoftheoldleathercontainer.Heaskedhisteacher,”Sir,thewaterwasawful.Whydidyoupretendtolike___38____?”W_ww.k*s*5u.c@om
Theteacherreplied,”Youtastedthewater.Itastedthegift.Thewaterwassimplythecontainerforanactofkindnessandlove.Nothingcouldbe___39___(sweet).”
Weunderstandthislessonbest____40___wereceivegiftsoflovefromchildren.Whetheritisacheappipeonadiamondnecklace,theproperresponseisappreciation.Welovetheideawithinthegiftratherthanthething.
理由是什么？