in the city for thirty years, the old man moved back to the countryside.A. Having workedB

发布时间：2020-08-16 09:04:04


     in the city for thirty years, the old man moved back to the countryside.
A. Having worked
B. Working
C. To have worked
D. To work

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(答案→)A. Having worked
B. Working
C. To have worked
D. To work
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