great changes----in china since 1919A have been taken place B hav_英语解答

great changes----in china since 1919
A have been taken place B have taken place为什么答案是B 为什么不用被动语态

人气：331 ℃　时间：2019-12-01 06:39:58

解答

变化发生不是被动是,是自己发生的,不用被动语态,所以选B