This is not my Walkman．________is in thle dormitory．
A.I
B.My
C.Me
D.Mine
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D解析分析：空格词是句子的主语，后面没有跟名词。 (延伸)名词性物主代词作句子主语时要注意主谓语一致的问题。This is not my Walkman．Mine is in the ormitory．此处mine是指my Walkman，是单数。These are not my textbooks．Mine are in my own schoolbag．此处Mine是指my textbooks，是复数。