◎ 题干
Without proper lessons, you'll _____ bad habits when playing the piano.
[     ]
A. keep up
B. pick up
C. catch up
D. put up
◎ 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“Without proper lessons, you'll _____ bad habits when playing the piano. [ ]A. keep upB. pick up C. catch up D. put up …”主要考查了你对  【动词短语】  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。