Question

―――(kate and tom)aunt is going to pick them up at school tom

Answer 1

Kate and Tom's

分析：aunt为单数,即两人共有一个aunt

若一样东西为两人共有,则后一个人名用所有格；

如果不是两人共有,而是各有各的,则两个名词都用所有格,且其后名词应为复数.

例如：　　The woman dressed in blue is Mary and Alice’s mother．

那个穿蓝衣服的妇女是玛丽和爱丽丝的母亲.

You should find what the difference between Mr． Smith’s and Mr．Black’s cars is．

你应当发现史密斯先生与布莱克先生的汽车的不同之处.