where引导定语从句可以做主语么？

Question

China’s State Council has approved to set up the International Cooperation Demonstration Area at the Tumen River region where meet the borders of China, Russia and North Korea（中国国务院已批复于中国、俄罗斯和朝鲜三国交界处的图们江区域设立国际合作示范区。）中， where后面的meet应该是谓语，where在这里是引导主语么？

Answer 1

三句子都是定语从句。第一个主句是The hotel was not clean，从句是 where we stayed ，where在从句中做地点状语。第二个主句是This is the museum ，从句是 which we visited last year， which 在从句中做宾语，还可省略。第三个答案为B，主句The young woman is a young doctor，从句I spoke to him just now,to him 可用to whom 替换。
这样可以么？

Answer 2

此句为倒装句