I ( )in the factory for over one year A.work B.worked C.have worked D.was working

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I ( )in the factory for over one year A.work B.worked C.have worked D.was working

I ( )in the factory for over one year A.work B.worked C.have worked D.was working
I ( )in the factory for over one year A.work B.worked C.have worked D.was working

I ( )in the factory for over one year A.work B.worked C.have worked D.was working
c

C.have worked
for over one year 有时间段,完成时。