一道交际英语选择题

一道交际英语选择题
In order to learn to speak English well ,______
A much practice is needed
B one needs much practice
C much practice is needed by one
Done is needed much practice
答案给的是A
D选项就不用说了 语法就错了 但是ABC语法都没问题啊 为什么选A
我认为前半句既然说的是为了学好英语 主语就应该是人 所以后半句主语就应该是one
B选项应该是最优答案
...问老师他也没解释出来个什么.