◎ 题干
If you are weak _______ a subject, _______ and asking a teacher for advice can help.
[     ]
A. at;  working hard
B. in;  work hard
C. at;  work hard
D. in;  working hard
◎ 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“If you are weak _______ a subject, _______ and asking a teacher for advice can help.[ ]A. at; working hard B. in; work hard C. at; work hard D. in; work…”主要考查了你对  【分词】【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。