◎ 题干
—Jack, is maths difficult to learn in High school?  
—Sure. No subject can be learned well __________hard work.
[     ]
A. without  
B. through  
C. by  
D. with
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“—Jack, is maths difficult to learn in High school?—Sure. No subject can be learned well __________hard work. [ ]A. withoutB. through C. byD. with…”主要考查了你对  【介词】  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。