主从复合句的用法和例句

例句：

1、They believe that the computer will finally take the place of human beings.

他们相信计算机终将代替人类。

2、I wonder whether I should say something for him to the headmaster.

我不知道是不是该为他在校长跟前说点什么。

3、He asked me where he could get such medicine.

他问我在哪儿能搞到那样的药。