Liu Ying and Liu Li are _____.They look nearly the same .Atwin sister B twins sisters C twin sister
问题描述：
Liu Ying and Liu Li are _____.They look nearly the same .Atwin sister B twins sisters C twin sister
答
应该是： twin sisters 选择答案可以错了.当提到孪生姐妹两人时用twin sisters,提到其中一个人时用twin sister.例如：Lucy and Lily are twin sisters. They are going to have a busy day next Saturday. 露西和莉...