◎ 题干
_______ necessary for us _______ English well.


A. This is; to learn
B. It's; to learn
C. It's; learn
D. That's; learn

◎ 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“_______ necessary for us _______ English well.[ ]A. This is; to learnB. It’s; to learnC. It’s; learnD. That’s; learn…”主要考查了你对  【不定式】【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。