英语句子改错！在线等！

Mary's favourite subject is sports. She is more athletic than us.
athletic是多音节形容词，比较级前要加more
China has a larger population than any other country in the world.
在同一个范围内比较，用any other 名词单数
e.g.China is larger than any other country in Asia.
在不同范围内比较，用any 名词单数
e.g.China is larger than any country in Africa.
人口用名词population，表示比较级时前用bigger或larger

第二句 是双关 语
所以 省略的比较状语从句 应加上 谓语 does 说明 前面是主语 而不是宾语
China has more people than any other country in the world does.

第一句athleticer改为more athletic,因为athletic是多音节词。
第二句找不到错误嘛。