Without proper lessons, you could a lot of bad habits when playing the piano.
A. keep up
B. pick up
C. make up
D. catch up
网友回答
A. keep up
(答案→)B. pick up
C. make up
D. catch up
解析：本题考查动词短语辨义。keep up继续，保持；pick up学到，养成；draw up靠近，拟订，制定；catch up赶上。根据句意“你如果学习方法不适当，弹钢琴时就会养成很多坏习惯。”可知，该题的正确答案为B项。