城市里的旧建筑一座接一座地被拆除，并替换成现代玻璃塔楼。

___One ___by ___one the old buildings in the city have been demolished and replaced with modern glass towers.

他们一个接一个地进入房间。

They entered the room ___one ___by ___one.

他一个接一个地会见哈利的朋友们，以查明他是如何死的。

He met Harry's friends ___one ___by ___one to find out how he died.