Question

【题目】Here is a book, but it isn't _________.
A.my
B.you
C.yours
D.your

Answer 1

【答案】C
【解析】句意：这儿有一本书，但是不是你的。my和your是形容词性物主代词，不能单独使用，必须跟名词。you是人称代词；yours是名词性物主代词，相当于your+名词；此处意思是It isn't your book=It isn't yours。故选C .