#四级英语听力下载习题材料 搜索结果
Therewasonceatime,alongtimeago,whenchildrenhadadifferentwayoflife.Backduringthispointinhistory,theonlythingthatchildrenneededtolearnwashowtocopewiththeenvironmentaroundthem.Theyhadtolearnphysicalsurvivalskills
