50 should be enough to be going on with.

　　50英鎊該夠應付一時(shí)半會(huì )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(tīng)了，就會(huì )知道發(fā)生什么事了。

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

　　吵鬧聲不絕于耳，我無(wú)法集中精神。