要详解This factory ( )for twenty years.A.has opened B.has openC

要详解This factory ( )for twenty years.A.has opened B.has openC This school( )for forty years.A,open B,has opened C,has been this factory has been open for twenty years.为什么是open 而不是open He;s worked in this factory for many years ------ he?A.has B the factory has been open for twenty years 还是the factory has The factory ___since 1985.a.opened b.has opened c.was opened This factory opened twenty years ago.同义句转换 This factory opened twenty years ago( 改为同义句） This factory(ha This factory opened twenty years ago.（同义句转换）This factory ( ) This factory opened twenty years ago (同义句转换）This factory ___ Mr .Zhang has been a teacher _________ twenty years.A for B. .The factory has been ________ for three years.A.to open B.o