Lostwalletswhichcontainapictureofababyaremorelikelytobereturnedtotheirownersscientistshavediscovered.

Researchersleft240walletsonthestreetsofEdinburghlastyeartoseehowmanywerereturnedtotheirowners.Someofthewalletscontainedoneoffourphotographs—ababyacutelittledogafamilyandaportraitofanelderlycouple.Otherwalletscontainedacardsuggestingtheownerhadrecentlymadeacharitydonationwhileacontrolsample(对照组)containednothingatall.

ProfessorRichardWisemanapsychologistwhowasinchargeoftheexperimentsaid42percentofthewalletswerepostedbackintotal.Thosecontainingthepictureoftheinfantorthebabyweremostlikelytobringaboutanhonestreactionfromthefinderwith88percentbeingreturnedfollowedbythosecontainingpicturesofthelittledogat53percent.Ofthosefeaturingthefamilysnapshot48percentweresenttothereturnaddressandonly28percentofthosewiththepictureoftheelderlycouple.Walletscontainingthecharitycardsandthecontrolsamplewereleastlikelytobereturnedwithratesof20and15percent.

ProfWisemanoftheUniversityofHertfordshiresaid“Thebabykickedoffacaringfeelinginpeoplewhichisnotsurprisingfromanevolutionaryperspective(角度).Wewereamazedbythehighpercentageofwalletsthatcameback.”

Thewalletswereplantedatrandomaboutaquarterofamileapart.Snapshotswereinsertedintoaclearplasticwindowinsidethewalletsnoneofwhichcontainedmoney.

29.What’sthemainideaofthepassage?

A.Researchersleft240walletsonthestreetsofEdinburghlastyear.

B.ProfessorRichardWisemancarriedoutanexperimentwith240wallets.

C.Lostwalletscontainingapictureofababyaremorelikelytobereturned.

D.Walletswithcontainnothingaremostlyreturnedtotheirowners.

30.Thepassageismadebelievableby .

A.tellingstories B.usingfigures C.askingquestions D.givingexamples

31.Theunderlinedphrase“kickedoff”inParagraph4mostprobablymeans“ .”

A.caused B.showed C.avoided D.accepted

32.Itcanbeinferredthat .

A.peoplewhoreturnedthe