To keep healthy, Mr. Smith cycling as a regular form of exercise after he retired.
A. took up
B. put up
C. gave up
D. made up
网友回答
(答案→)A. took up
B. put up
C. gave up
D. made up
解析：短语辨析。A占据，从事于，开始做；B张贴，搭建了；留宿；C放弃；D化妆，编造，弥补；组成；句意：为了保持健康，斯密斯先生退休以后开始把骑自行车作为一种锻炼的方式。根据句意说明A正确。