问题补充：
This is my room and that’s my room.
A. father and mother
B. father’s and mother’s
C. father’s and mother
D. father and mother’s
答案：
A. father and mother
B. father’s and mother’s
C. father’s and mother
(答案→)D. father and mother’s
解析：本题为一间房间，表示两个人共同所有，只需要写最后一个名词的名词所有格，故本题选D。
