他突然站起来，走出了房间。

___All ___at ___once he stood up and walked out of the room.

突然，一切又开始正常运转了。

___All ___at ___once, everything started to work again.

这个问题的解决方案突然浮现在我脑海中。

The solution to the problem came to me ___all ___at ___once.