Question

【题目】To keep healthy，Professor Johnson cycling as a regular form of exercise after he retired．
A.took up
B.caught on
C.carried out
D.made for

Answer 1

【答案】A
【解析】句意：为了保持健康，Johnson教授退休后开始把骑车当作一种常规的锻炼方式。take up开始从事；占据；catch on挂住；carry out开展；执行。make for前往; 冲向。根据句意可知选A。