The book is one of ____ ALily's sister BLily's sister's book CLily's sister's DLily sister's

问题描述:

The book is one of ____ ALily's sister BLily's sister's book CLily's sister's DLily sister's
The book is one of ____
ALily's sister BLily's sister's book CLily's sister's DLily sister's

答案C、D中可能有一个打错了,应该是Lily's sisters'.
one of后面一定是跟复数的,而这里又应该使用所有格.两者结合,答案就选出来了.