【JohnBrownwasashopkeeper．Hesoldandrepairedwatchesinhissmallshop．Onedayhiscousin，Mike，cametotheshopandsaidtohim，"I'velostmyjob．Doyou（15）___ifIworkinyourshop？""Certainlynot．I'llteach】

　　JohnBrownwasashopkeeper．Hesoldandrepairedwatchesinhissmallshop．Onedayhiscousin，Mike，cametotheshopandsaidtohim，"I'velostmyjob．Doyou （15）___ifIworkinyourshop？""Certainlynot．I'llteachyoueverythingIknowaboutwatches，"JohntoldMike．Forthefirstfewweeks，Mikeworkedveryhard．Hewaspoliteandhelpfultothecustomers （顾客）．Hecleanedtheshelvesand （16）___whereeverythingwasintheshop．Johnwasverypleasedwithhim．WhileMikelooked （17）___thefrontoftheshop，Johnwasabletoworkandbuilduptherepairbusinessinthebackroom．

　　Afteramonthandahalf，Mikeasked，"Isthereanythingelseyouwantto （18）___me？"

　　"Yes，Mike，thereis，"Johnsaid．"It'stimeItaughtyouthesecretofour （19）___．"

　　"IthinkIknowthat，"Mikesaid．"Youbuywatchesatonepriceandsellthematahigherprice．The （20）___inpriceisourprofit （利润）．"

　　"That'strue，butit'snotwherewemakemostofourprofit，"Johnsaid．He （21）___awatchfromthecounter （柜台）．"Doyouthinkthiswatchisagoodone？"heaskedMike．"No，Idon'tthinkso．It'sacheapone，"theyoungmananswered．"Wecan'tmakemuchprofitfromsellingthose．Perhapsonlyafewdollarseach．"

　　"That'swhereyouare （22）___，myboy，"Johnsaid．"Thosewatchesmakemoreprofitthananyotherwatchintheshop．"

　　"Couldyoutellme （23）___thosecheapwatchesmakemoreprofit？"Mikeasked．

　　"Theyarereallycheap，buttheyarealways （24）___，"Johntoldhim．"Wemakeourprofitfromrepairingthem．"

　　15．A．worryB．mindC．knowD．agree16．A．showedB．answeredC．learnedD．explained17．A．afterB．forC．atD．towards18．A．giveB．presentC．testD．teach19．A．planB．experienceC．successD．message20．A．discountB．choiceC．differenceD．level