问题 选择题
— Is _____ mother a teacher?
— Yes, and Lucy and Lily are _____.

A. Lucy and Lily's, twin sisters
B. Lucy and Lily's, twin sister
C. Lucy's and Lily's, twin sisters
D. Lucy's and Lily's, twin sister
答案

答案:A

补全对话,情景问答
单项选择题