He worked hard to some money for his retirement. A. set asideB. set outC. set offD. set a

问题补充：

He worked hard to some money for his retirement.

A. set aside

B. set out

C. set off

D. set about

答案：

(答案→)A. set aside

B. set out

C. set off

D. set about

解析：本题的含义是他努力地工作是为他的退休而留出一些钱备用，set aside可以表示留出的意思，故本题选A。