This isn't___( I )book.___ ( my ) is in the bag .
问题描述:
This isn't___( I )book.___ ( my ) is in the bag .
答
第一空用形容词性物主代词my,修饰名词book,第二空用名词性物主代词Mine,它相当于一个名词,在本句中做主语,相当于my book.望采纳,祝好运!