They a small laboratory and devoted every spare moment to this work.
A. picked up
B. put up
C. set up
D. grew up
网友回答
A. picked up
B. put up
(答案→)C. set up
D. grew up
解析：词义辨析。picked up拾起，捡起；put up挂起，张贴；set up建立，设立；grew up长大，成长。句意：他们建立了一个小实验室，把所以业余时间都投入到这项工作中。所以选C。