This factory opened twenty years ago.(同义句转化）.该怎么转?

this factory opened ten years ago(同一句) this factory opened ten years ago(同义句)10 years this factory open This factory opened twent years ago同意句 This factory _______ ________ ______for twenty years This factory opened twenty years ago.同义句转换This factory opened twenty years ago.This factory _______ __________ for twenty years. This factory opened twenty years ago (同义句转换）This factory ___ ____ ____for twenty ago this factory has been open for twenty years.为什么是open 而不是opened This factory opened twenty years ago.(同义句转化）.该怎么转? This factory opened twenty years ago.(同义句转换）This factory___ ___ ___ for rwenty years. 要详解This factory ( )for twenty years.A.has opened B.has openC.has been poen D.has been popened The factory ___since 1985.a.opened b.has opened c.was opened d.has been open This factory opened twenty years ago( 改为同义句） This factory(has been open)for twemty years(open) 是不是错了请解释我的练习册是新二第52课练习请回复 This factory opened twent years ago同义句问题has been open 一直没搞懂这个open 是什么词性.如果是被动语态 不应该是 has been doen The factory opened ten years ago 改同义句 The factory opened ten years ago它的被动语态 同义词转换The factory opened twenty years ago.The factory ( ) ( ) ( ) for 20 years. The factory opened ten years ago.同义句The factory ___ ____ ____for ten years The factory opened ten years ago.同义句是：The factory ---- ----- ----- for ten years. The factory opened twenty years ago.（同义句） TThe factory opened twenty years ago.（同义句） The factory（ ） for twenty years ago.