Are these ( their ) cards ? NO, (they ) are not ( theirs ) . (Theirs) aren't here .
注：后接名词用形容词性物代词； 作主语用主格或名词性物主代词,要区别哦.
祝你假期愉快!加油!不明白再问!如果帮到你,请采纳,谢谢!