问题
选择题
Without proper lessons, you could __________a lot of bad habits when playing the piano. [ ]
A.give up
B. catch up
C. pick up
D. keep up
答案
答案：C
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Without proper lessons, you could __________a lot of bad habits when playing the piano. [ ]
A.give up
B. catch up
C. pick up
D. keep up
答案：C
，ANB6°，4个第三磨牙牙胚存在，位置正常