◎ 题干
This is       river. Few of us can swim       it, I think.
A.a 800-foot-wide; over
B.an 800-foot-wide; across
C.a 800-feet-wide; over
D.an 800-feet-wide; across
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“This isriver. Few of us can swimit, I think.A.a 800-foot-wide; overB.an 800-foot-wide; acrossC.a 800-feet-wide; overD.an 800-feet-wide; across…”主要考查了你对  【基数词】【序数词】【时刻】【分数】  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。