Alice has a red pen and the blue one is too.A. his B. her C. hers

问题补充：

Alice has a red pen, and the blue one is ,too.

A. his B. her C. hers

答案：

解析：his形容词性物主代词，他的；her形容词性物主代词她的，人称代词宾格，她；hers名词性物主代词，她的。句意：爱丽丝有一支红色的钢笔，并且这支蓝色的也是她的。结合语境可知本句中用名词性物主代词做表语，故选C。