How about: "Who was the first emperor of Shu?"
That would be obvious. There can be multiple answers like, Liu Bei, Liu Xuande, Emperor Zhao Lie.
Or: "What another name for Kongming?"
The answers could be Zhuge Liang, Wolong, Master Wolong, Zhuge Kongming.
Or: "Who was Zhou Yu serving under when he died?"
Answer: Sun Quan
The only problem with this is that if there are people who don't really know much about this topic, they won't be able to make an account which, I guess they don't deserve if they can't answer these simple questions, but, it is still kind mean… Anyways, those were my ideas. Hope you like it!!!