to where引导什么从句

　　It's one of the few countries where people drive on the left.

　　这是为数不多的几个靠左行驶的'国家之一。

　　I find it difficult to be objective where he's concerned.

　　只要涉及他，我就难以做到保持客观。

　　There comes a point where you give up.

　　现在你该放弃了。

　　Where did you go to school?

　　你是在哪里上的学？

　　Where would be the best position for the lights?

　　这些灯装在什么位置最好？