__is know to everybody that Russia is the biggest country in the _英语解答

__is know to everybody that Russia is the biggest country in the world.
空上为什么填 It 不填 As

人气：169 ℃　时间：2020-01-28 14:12:13

解答

it在此只是个形式主语,真正的主语是 that Russia is the biggest country in the world
as则没有代词的功能