I had rather have a room of my own,however small it is,than

I had rather have a room of my own,however small it is,than ____a room with someone eles.a.share b.to share c.sharing d.to have shared该选哪个·?是选 A 请 选A 的 同学给以个解释啦····· 谢谢········· 另外 请下面的同学 应该怎么分析这样的句子结构 这是什么结构的句子 怎么看·？