Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient ...

Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient ...

小编整理出小学英语考试中常出错的知识点，快来学习吧~ 10. play (-ing形式) —— playing 11. listen (-ing形式) —— listening 12. collect (-ing形式) —— collecting ...