东柏林和西柏林之间的墙在1989年倒塌。

The wall ___between East and West Berlin came down in 1989.

过去十年间，贫富之间的差距急剧扩大。

The gap ___between the rich and the poor has increased dramatically over the past decade.

我认为我镇附近最有趣的地方是那些山，它们就像我国和中国之间的一堵墙。

I think the most interesting place near my town is the mountains, which are like a wall ___between my country and China.