It seems like your sentence was cut off. If you're trying to say that someone speaks in a certain manner, you could complete the sentence like this:
- "He talks as if he knows everything."
- "He talks as if he's been there before."
- "He talks as if he doesn't care."
Could you please provide more context or finish the sentence so I can give you a more accurate response?
He talks as if he ________ everything in the world.
A. does know
B. has known
C. knew
D. know
C
解析
虚拟语气题：根据句意可知后面的状语从句是对现在事实的虚拟假设，因此从句谓语应用过去式，故选C。
