You've really got to see

你必须得看看...

have got to
conj. 不得不(必须)

例句：

Jim broke away from his friends, saying"I have got to hit the books."
吉姆离开他的朋友时，说道：“我得回去做功课了。”

I have got to phone one.
我要给人打电话。

I have got to make some copies to hand out .
我需要复印一些文件以便分发。

But we have got to ask first.
但我们首先要征得同意。

你已经开始看了.(你已经看到了)

根据句子的情境才好翻译.

一楼胡扯,二楼正解,三楼胡扯,四楼正解,五楼是我,我的答案是
你(还)真得看看! 五楼正解.

你已经看了