All his free time is by charity work, but he feels it meaningful.
A. put up
B. given up
C. picked up
D. taken up
网友回答
A. put up
B. given up
C. picked up
(答案→)D. taken up
解析：考查动词短语辨析。A张贴，搭建，留宿；B放弃；C捡起；用车接；无意中学会；接受信号；康复。恢复；染上…； D占据，从事于，开始做；句意：他所有的空闲时间都被慈善事业占据了，但是他感觉这一切很有意义。故D正确。