OneeveningIwentoutandleftmy17-year-oldsoninchargeofhis8-year-oldbrotherand4-year-oldsister．Onthisoccasion，theworkwasmadelesstroublesomebythepresenceofhisgirlfriend．Ileftwithcompleteconfidencethattheolderchildrenwoulddoawonderfuljobofbabysittingtheyoungerchildren．Later，IdiscoveredthatcompleteconfidencewasthelastthingIshouldhavelefthomewith．

Ihaddecidedtoreturnhomeearlierthanplannedsothatmysonandhisgirlfriendcouldgoout．Icalledhomewiththishappynews．Butinsteadofhearinghischeerful，gratefulvoiceontheotherendoftheline，allIheardwasthesoundofatelephoneringing．

Itwas，Ishouldpointout，after10p．m．，whenthetwoyoungerchildrenshouldhavebeeninbed，andwhenthetwoolderchildrenshouldhavebeenansweringthephone．"I'llgivehimalesson，"Isaid．Idecidedtheymustbeoutside．Whytheymightbeoutsideat10：30onawinternightIhadnoidea，butitwastheonlyexplanationIcouldcomeupwith．

Finally，indesperation，Icalledhisgirlfriend'shouse．Afterwhatseemedlikecountlessrings，hisgirlfriendanswered．"Yes，"shesaidbrightly，"He'srighthere．"

Hecameonthephone．Iwasnotmyusualcalm，rational（理智的）self．Afterall，oneoftherulesofsurvivalformodernparentsisthatyoucan'ttrustmodernteenagers．"Wherearethechildren？"Isaid．Hesaidtheywerewithhim．Theyhaddonenothingwrong．Mysonhadtakentheyoungerchildrenovertohisgirlfriend'shousejustforicecreamandcake．Thiswastoogoodtobebelieved．Well，itturnsoutthatIshouldn'thavebelievedit．Itwasonlypartofthetruth．

ThefollowingSaturdayeveningwewereatmyparents'home，celebratingmybirthday．Myoldestsongavemethechildren'sgifts．Mountedandframedwereaseriesoflovelycolorphotographsofmychildren，dressedintheirbestclothes，andwearingtheirmostwonderfulexpressions．Theyarepicturestotreasurealifetime，alltakenbythefatherofmyson'sgirlfriend．

61．Theauthorwentoutandlefthereldestsoninchargeoftheyoungerchildrenbecause___．

A．sheknewthathereldestsonwasagoodbaby-sitter

B．shethoughtitnohardworktotakecareoftheyoungerones

C．shebelie