This is room, and it is beautiful and lovely.
A. Betty and Sara
B. Betty’s and Sara’s
C. Betty and Sara’s
D. Betty’s and Sara
网友回答
A. Betty and Sara
B. Betty’s and Sara’s
(答案→)C. Betty and Sara’s
D. Betty’s and Sara
解析：表示两个人共有某个事物，在最后一个名词后使用所有格即可，故本题选C。