分类：教育/科学-学习帮助
问题：几个单选题,要理由1.Shanghaiis______inthe 
1.Shanghai is ______ in the world.A.a largest cy B.one of largest citiesC.one of the largest cityD.one of the largest cities2.These are _______houses.A.Mr Green's and Mr Wang's B.Mr Green and Mr Wang's C.Mr Green's and Mr Wangs D.Mr Greens' and Mr Wangs3.The computer1.Shanghai is ______ in the world.A.a largest cy B.one of largest citiesC.one of the largest cityD.one of the largest cities2.These are _______houses.A.Mr Green's and Mr Wang's B.Mr Green and Mr Wang's C.Mr Green's and Mr Wangs D.Mr Greens' and Mr Wangs3.The computer on the desk is_____.A.twins B.the twin's C.the twins D.the twins'
回答：1)D
是世界最大的城市当中的一个,这里"最大的城市"是一个群体,复数
2)A
Mr Green's and Mr Wang's 
Green先生的房子和王先生的房子.两个不同的房子
和are, houses对应
B是两个人共有的房子,动词和名词都要单数

3)D 用名词性物主代词
以S结尾的直接加'