◎ 题干
This is _____ and we must _____ on it.
A hard work; work hard           B a hard work; work hard
C hard work; hard work           D work hard; hard work
◎ 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“This is _____ and we must _____ on it.A hard work; work hard B a hard work; work hardC hard work; hard work D work hard; hard work…”主要考查了你对  【助动词】【介词短语】【固定搭配】【疑问词组】  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。