趣味英语。
Helen’s friend has eight animals．They are rabbits and ducks．They have twenty-eight feet（脚）．So，there are ________ rabbits and ________ ducks．
趣味英语。
Helen’s friend has eight animals．They are rabbits and ducks．They have twenty-eight feet（脚）．So，there are ________ rabbits and ________ ducks．
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