___he refused to accept any responsibility but he ended up apologizing应该选哪个?a为什么不对?for the first timeat first

___he refused to accept any responsibility but he ended up apologizing应该选哪个?a为什么不对?for the first timeat first
___he refused to accept any responsibility but he ended up apologizing
应该选哪个?a为什么不对?
for the first time
at first

___he refused to accept any responsibility but he ended up apologizing应该选哪个?a为什么不对?for the first timeat first
用B.for the first time 是“第一次”,at first是“起初,首先,刚开始”.用B的话整句的意思就是：起初,他拒绝承担任何责任,但他最终道歉了.

我觉得应该用 at first 吧.
起初他拒绝承担任何责任，for the first time 是第一次，翻译起来不合句意。

a在那里