Peter left his hometown ten years ago,and since then he_in a big city.a.worked b.works c.has worked d.is working肯定不是b和d对吧?

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Peter left his hometown ten years ago,and since then he_in a big city.a.worked b.works c.has worked d.is working肯定不是b和d对吧?

Peter left his hometown ten years ago,and since then he_in a big city.a.worked b.works c.has worked d.is working肯定不是b和d对吧?
Peter left his hometown ten years ago,and since then he_in a big city.
a.worked b.works c.has worked d.is working
肯定不是b和d对吧?

Peter left his hometown ten years ago,and since then he_in a big city.a.worked b.works c.has worked d.is working肯定不是b和d对吧?
C
用现在完成时 它表示过去发生并且已经完成的动作对现在造成影响或后果,过去某一时间开始并一直持续到现在的动作或状态.

是c
since后加现在完成时