Onceuponatime,aboywaswalkingthroughaforestwhenhefounda...
问题详情： Onceuponatime,aboywaswalkingthroughaforestwhenhefoundabigblackboardhangingonanoldewasalsoaboxofchalkbesidetheboytookapieceofchalkandstartedtodrawontheboard:firstatree,thenarabbit,thenaflower...