◎ 题干
This river has changed its course many times. It _________ always located where it ________ at present.
A.isn’t; is B.isn’t; will be C.wasn’t; is D.wasn’t; has been
◎ 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“This river has changed its course many times. It _________ always located where it ________ at present.A.isn’t; isB.isn’t; will beC.wasn’t; isD.wasn’t;…”主要考查了你对  【强调句】  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。