◎ 题干
It’s very hard ___________the swimming pool.
A.to swim across B.to swim cross C.swim across D.swim cross
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“It’s very hard ___________the swimming pool.A.to swim acrossB.to swim cross C.swim acrossD.swim cross…”主要考查了你对  【不定式】【分词】【动名词】  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。