单选题
Many elderly people have to live on the money they ______ when they were working.
A、
laid up
B、
put back
C、
set up
D、
put aside
【正确答案】
D
【答案解析】
put aside意为“储蓄”。此句意思是“许多老人得靠他们工作时所储蓄的钱生活”。
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