They never knew what( )to the world in a hundred years.是would hap_英语解答

They never knew what( )to the world in a hundred years.是would happen 还是would be happened?

人气：279 ℃　时间：2019-10-23 08:56:37

解答

would happen
happen 发生
这个词没有被动.不能说成“被发生”