He__there fo twenty years since hecame to this town.a.has worked b.worked c.work d.have worked为什么不选a,主语是第三人称谓语动词该用has吧？

He__there fo twenty years since hecame to this town.a.has worked b.worked c.work d.have worked为什么不选a,主语是第三人称谓语动词该用has吧？ Twenty. 佛字组词fo 这句话是不是存在错误?Homestake operated as a gold mine for one hundred twenty-five years before closing about nine years ago.是不是应该将 fo r或者 before 去掉? my friend Li Xiao knows my hometomn very well because he__there many times with me. 什么是CY-FO条款? 以 instead fo 造句 wife fo you love Learn fo know Learn fo konw you struggle fo you to 急...fo you im falling fo twenty序数词 Twenty-four twenty序数词 twenty-four twenty-four