Miss Smith is a close friend of .A. Mary mother’sB. Mary motherC. Mary’s mother’sD. Mary’s

问题补充：

Miss Smith is a close friend of .

A. Mary mother’s

B. Mary mother

C. Mary’s mother’s

D. Mary’s mother’s

答案：

A. Mary mother’s

B. Mary mother

C. Mary’s mother’s

(答案→)D. Mary’s mother’s

解析：这里主要考名词的所有格。