i refuse to accept the blame.---was someone else's fault

因为中间是句号 表示前面是个完整的句子 后面也是个完整的句子.
i refuse to accept the blame as that was someone else's fault.
which was
what 不能用在此处 因为先行词blame已经出现.
what 应该用在先行词没出现的地方 比如 i have finally found what they are looking for.或用which,句子变成i have finally found the letter which they are looking for. 这里的letter 就是先行词~ 希望能帮到你 欢迎追问~