- 問題詳情: Onceuponatime,aboywaswalkingthroughaforestwhenhefoundabigblackboardhangingonanoldewasalsoaboxofchalkbesidetheboytookapieceofchalkandstartedtodrawontheboard:firstatree,thenarabbit,thenaflower... Tohissurprise,wheneverhefinisheddrawingapictu...
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