◎ 题干
It's difficult ______ English well.

A. of us to learn
B. for us to learn
C. of us learning
D. for us learning
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“It's difficult ______ English well.[ ]A. of us to learn B. for us to learn C. of us learning D. for us learning …”主要考查了你对  【it的用法】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。