问题
选择题
To master a foreign language,______.
A．a lot of practice is needed
B．it needs a lot of practice
C．practice is in need of
D．one needs a lot of practice
答案
答案：D
不定式常修饰动词状语，表示行为的目的、结果、原因等。for+动名词一般不做目的状语，但for+名词化了的动名词可作原因状语