the factory has been open for twenty years 还是the factory has been opened for twenty years?

The factory has been -----for two years.-----怎么填? the factory has been open for twenty years 还是the factory has been opened for twenty years? Mr.Smith has been here since the factory opened为Mr.Smith has been here since the factory opened为什么用has been? The factory ___since 1985.a.opened b.has opened c.was opened d.has been open He has never been to the factory.（反义疑问句） He has never been to the factory,_____ _____?按要求完成句子, Mrs.Green ______ here since the factory opened.A.has goneB.has beenC.has arrivedD.has been in The reason that the factory was burned down has not been found out. tom has been in the factory --- he left school.a.since b.as soon as Jim has been in the factory for two years _______ he left school.A.when B. how long has the factory been open为什么open不用过去分词? he has been away from the factory .a a week ago b since a week ago The factory has been ------------- for two years.A.open B.to open Copening D.was in The factory has _since last year.a.opend b.be open c.closed d.been closed Mr dong ____ to the factory.He will be back __an hour .A .has gone,after B has been ,in C.has gone,in D has been ,after 88.The factory _______ since the May of 1999.A.has been open B.opened C.has opened D.has been The Blacks ___ in this factory since 1998 A has worked B has come C have been Dhave arrived The fadtory has been here since the 1970s 划线部分（since the 1970s )提问 ———（三个空）the factory been here? The factory has been (open)since two years ago .用括号内动词的正确形式填空