i don't think ___possible to master a foreign laguage without any___

问题描述:

i don't think ___possible to master a foreign laguage without any___
c it difficulty d it's difficult
说明原因

C.
it +形容词 + to do 结构作形式宾语,any+ 名词,difficulty是名词,difficult是形容词.
全句意思,我不认为掌握一门外语是没有任何困难的.
深更半夜帮你做题还带讲解,早点休息,明天还要学习呢小朋友~