◎ 题干
It's easy _____ the problem.
[     ]
A. for him solve
B. for him to solve
C. of him solving
D. of him to solve
◎ 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 easy _____ the problem. [ ]A. for him solve B. for him to solve C. of him solving D. of him to solve …”主要考查了你对  【不定式】【介词】  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。