——,one needs much practice.为什么选BA Learning swimming well is difficult B To learn to swim wellC Swimming to be learned well D Learning swim well

——,one needs much practice.为什么选BA Learning swimming well is difficult B To learn to swim wellC Swimming to be learned well D Learning swim well
——,one needs much practice.为什么选B
A Learning swimming well is difficult B To learn to swim well
C Swimming to be learned well D Learning swim well

——,one needs much practice.为什么选BA Learning swimming well is difficult B To learn to swim wellC Swimming to be learned well D Learning swim well
做这条题目,你可以先把他翻译一下：他需要多做训练.他多做训练的目的是什么呢?是把游泳学好了,所以这横线上是目的状语,用to do做目的状语,表示多做训练的目的是为了把游泳学得更好

这是个倒装句，正常语序是One needs much practice___,to通俗点表示为了，故选B,意思为为了很好的学习游泳，他需要很多练习

——，one needs much practice，横线上明显是需要一个目的状语从句。
而只有B选项 To learn to swim well 是符合题意的

To learn to swim well, one needs much practice. 学好游泳需要大量的练习。

若有疑问及时追问，满意敬请采纳，O(∩_∩)O谢谢~~

动词不定式表目的