- 背诵为王第一册Unit42::TwoGoatsontheBridge42TwoGoatsontheBridgeOnedayagoatstartedtocrossalittlebridge.Atthatveryminute,anothergoatstartedoutfromtheothersideofthebridge.Whentheysawoneanother,theyknewthatoneofthemwouldhavetogoback."Goback!?criedthefirst...
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