一个英语句子的问题~It seemed like everyone has known the news.IT在这的意思

It seems/seemed like ...
是固定用法,意思是“看起来好像是...”
it 没有特别的意思
详细请参考：
It seems like...
那好像是······
"It seems like..."的意思是"好像,仿佛感到"."it"是形式主语,具体的内容在"like"后面.也可以说"it seems that...".
支持范例
1.It seems like there are hundreds of people in the room,it's too crowded and noisy.
屋里好像有几百人,又挤有吵.
2.It seems that nobody knew what had happened.
好像没人知道发生了什么事.
3.It seems that something is wrong.
好像有什么事不对劲.
会话记忆
A:Mary,do you remember when we met?
玛丽,你还记得我们认识的时候吗?
B:I won't ever forget it!I was sitting in the cafeteria all by myself...
我永远也忘不了!我当时一个人坐在自助餐厅.
A:And I came up and asked to sit by you...
而我走过来,要求坐在你旁边.
B:Oh,it seems like it was just yesterday.
哦,那好像是昨天刚发生的事一样

It在这作的是形式主语，形式主语知道吧？就是一个形式上的主语而已，并没多大实际意义。

it 是形式主语，没有实际意义，真正的主语是后面everyone has known the news

形式主语，并没有实际意思的，指代的就是这句话本身的意思。