问题补充:
---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. 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
解析:在表示两个人共有某个东西时,’s要加在最后的那个人后面,Lucy and Lily 是复数,故选A