— What's this in English?
— .
A:It's a pen
B:My name is Jack
C:Her name is Helen
D:He is fine
It's time _______ school.
尽管已经过去了两千多年,人们还在热烈地讨论柏拉图这个人物,并且存在很大的意见分歧。这种讨论( )