It's FREEPOST, so there's no need for a stamp.这是免费邮寄，不用贴邮票。Reply to Publicity Department, FREEPOST, Oxford University Press, Oxford.回信免费邮寄至牛津牛津大学出版社宣传部....
After the Opium War of 1840,China was gradually reduced to a semicolonial and semi-feudal society.1840年鸦片战争后,中国逐渐沦为一个半殖民地半封建的社会。Opium is addictive.鸦片会让人上瘾。Opium is classed under the head of narcotic.鸦片是归入麻醉剂一类的东西.Opium i...