在某个时刻，他似乎完全忘记了自己在说什么。

At one ___point, he seemed to completely forget what he was saying.

如果在这个时刻你决定离开，那也没关系。

If, at this ___point, you decide to leave, that is fine.

已经到了我无法忍受与他说话的地步。

It has got to the ___point where I can't bear to speak to him.