i can't understand anything_____he says是what 还是that

i can't understand anything_____he says是what 还是that
i can't understand anything_____he says
是what 还是that

i can't understand anything_____he says是what 还是that
I can't understand anything_____he says
=I can't understand anything that he says=I can't understand what he says在定语从句中,当先行词是不定代词时候,引导定语从句关系代词只能是that,因此答案为 上面的

i can't understand anything__that___he says
我不相信他说的任何事

that
anything that
或者直接写what