which引导的从句

There are two points which I wanted to make.

我想要指出的有两点。

We are still friends, though, which is good.

不过我们仍然是朋友，这令人感到欣慰。

Which part of Japan do you come from?

你是日本哪个地区的`人？

There is some noise in the data which needs to be reduced.

资料里有一些需要删除的不适用信息。

Which is the largest city in the world?

世界上最大的城市是哪个？