At what point did the Urim V'tumim cease?

The evils of drinking. 

The Mishna describes the different things that ceased over the time period prior to the destruction of the Beis Hamikdash. 

Who were the "wakers" and the "strikers". 

Why Yochanan Cohen Gadol ceased the confession of Masser. Why the Takanah of D'mai was enacted. 

What happens when the murderer is found. What to do in cases of contradicting witnesses. The things that ceased as the Churban approached.    

How Parah can be more stringent then Eglah if it's derived from there. The rules of Prat and Klal. 

Why you need three sources for the fact that used animals can be brought as a sacrifice. Questioning the statement of Rav Yehudah in the name of Rav.

Why the Torah wrote the word בה by עגלה ערופה.

The reason we don't derive the laws of Egalh Arufah from Parah Adumah.