几乎没有人知道篮球是如何起源的
（Few）people know how basketball （came into being）
Naismith班里有18个男生,他把他们分成了9人的两支球队,并教他们如何进行这种新运动
Naismith had a class of 18 boys.
he （divided）them （into）two teams of nine and taught them （how to play the game〕
这种深受欢迎的运动被男女老少所喜爱
This （kind）sport （is deeply loved）by men and women ,and by young and old