【题目】To keep fit, my uncle cycling as a regular form of exercise after retirement.
A. picked up B. came up C. turned up D. took up
在线课程【答案】D
【解析】
考查动词词组。句意：为了保持健康，约翰逊教授在退休后开始将骑脚踏车作为他常规锻炼的方式。A. picked up捡起，获得；B. came up走进，提出；C. turned up调高，出现； D. took up拿起，从事。故选D。