They the great changes in our hometown.

我们家乡的巨变令他们惊奇万分。

We witnessed great changes in the city.

我们目击了这个城市的巨大变化。

Great changes have taken place in China since.

中国发生了翻天覆地的变化。

Great changes have taken place since you left.

你走了以后，这里发生了巨大变化。

Great changes have taken place in my hometown.

我的家乡发生了巨大的变化。