B
定语从句,that做从句主语,where是副词,不能做主语.
that也可以用which,不过此题,无此选项.where是副词，为什么不能作主语？没为什么啊，语法规定的呀。主语总归是名词，代词。如果用where就得”I hope to visit where are very beautiful and interesting.that 指代place哦，我了解了，谢谢