China is an old country with a 5000-year history.（同义句）China is an old country with _____ _____ history.
问题描述：
China is an old country with a 5000-year history.（同义句）
China is an old country with _____ _____ history.
答
a long
答
5000 years'
答
fifty centuries 五个世纪
答
5000 years