◎ 题干
Once new difficulties _____ in our new job, we should learn to use our brains to solve them.
A.riseB.causeC.ariseD.raise
◎ 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“ Once new difficulties _____ in our new job, we should learn to use our brains to solve them.A.riseB.causeC.ariseD.raise…”主要考查了你对  【一般现在时】【一般现在时的被动语态】  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。