It's not easy _______ Chinese students _
题型：选择题
问题：
It's not easy _______ Chinese students _______English well. [ ]
A. of, to learn
B. for, learning
C. of, learning
D. for, to learn
It's not easy _______ Chinese students _______English well. [ ]
A. of, to learn
B. for, learning
C. of, learning
D. for, to learn