30.This machine,______for many years,is still working perfec

30.This machine,______for many years,is still working perfec 30.This machine, ______for many years, is still working perf This machine,______for many years,is still working perfectly the machine-,( )for many years,is still walking perfectly if the machine is working this kind of machine was using many years ago 找出错误一项并改正 By the end of this year he ______for thirty years. This machine is unavailable. The machine ___(invent) many years ago. This camera _________(buy)many years ago,but it still works xiexieThough his faher ______for many years……A has retired B Her uncle worked as an ______for many years in the company.(