【正确答案】:
AS ONE OF THE CRADLES OF HUMAN CIVILIZATION, CHINA HAS ALL ALONG MAINTAINED ITS CULTURAL TRADITION WITHOUT LETUP IN ITS HISTORY OF SEVERAL THOUSAND YEARS.
【题目解析】:数字的表述,thousands of years 几千年,当没有of的时候,例如: several thousand years中thousand必须是单数。
AS ONE OF THE CRADLES OF HUMAN CIVILIZATION, CHINA HAS ALL ALONG MAINTAINED ITS CULTURAL TRADITION WITHOUT LETUP IN ITS HISTORY OF SEVERAL THOUSAND YEARS.