问题补充:
--- Is this your sister’s key, John? --- No, it isn’t. is in the bag.
A. She
B. Her
C. Herself
D. Hers
答案:
A. She
B. Her
C. Herself
(答案→)D. Hers
解析:She人称代词主格,她;Her人称代词宾格,她。形容词性物主代词,她的; Herself反身代词,她自己;Hers名词性物主代词,她的。句意:约翰,这是你的姐姐的钥匙吗?——不,这不是。她的在包里面。结合语境可知下文为名词性物主代词作主语,故选D。