Twins sister和Twin sisters有什么区别,什么时候用Twins sister,什么时候用Twin s

Twins sister和Twin sisters有什么区别,什么时候用Twins sister,什么时候用Twin s How old is your ____!A,sisters B、twins C、twin sister D、twin twin sisters与twin sister的区别 单项选择Susan and Sue are( ) A.twin sister B.twins sisters C.twi They are ____ .A twin B twin brothers C twin sisters D twins twin的所有格是twins'还是twin's A and B are twin sister.twin和sister要加s吗? The coats are over there A twin B twins C twin's D twins' twins和sisters的区别 twin的用法!twin在什么时候加s,什么时候不加,最好有几个例句, Lily's twin sister appears happy? twin sister是什么意思