1,(The man you said who【is】 talking to my mother is my brother)
这句有点点问题,就是上面【】里的is,应该为was.
2,(Tools that you hold,one of which is red【】 is mine)
这句【】内应加个逗号【,】隔开.
3,(My sister【】 in the place where is beautiful 【】 has been visisted by everyone)
这句话问题就比较大.上面第一个【】的地方,sister和in the place中间缺个词.第二个括号这边的问题在于,【】前后都是修饰place的,怎么能直接连在一起呢.而且,整体上,这样的表述很不协调.建议可以改成:
(The place where my sister lives in is beautiful and has been visited by everyone.)