问题
选择题
John _____ knowledge of radio just by staying around the radio station.
A．caught on
B．worked up
C．took up
D．picked up
答案
D
picked up偶尔学到，习得。
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John _____ knowledge of radio just by staying around the radio station.
A．caught on
B．worked up
C．took up
D．picked up
D
picked up偶尔学到，习得。