50 should be enough to be going on with.

　　50英鎊該夠應付一時半會兒的了。

　　There's building work going on next door.

　　鄰居正大興土木。

　　She wasn't slow to realize what was going on.

　　她很快意識到出了什么事。

　　You would know what was going on if you'd listened.

　　你若是注意聽了，就會知道發生什么事了。

　　I can't concentrate with all that noise going on.

　　吵鬧聲不絕于耳，我無法集中精神。