题目内容：

阅读下面材料，在空白处填入适当的内容（一个单词）或括号内单词的正确形式。

In recent years, the silk culture of China and the Belt and Road Initiative have become worldwide hot topics with China's international effect 1. (recognize) by more and more countries.

It is true that the old Silk Road is linked with silk. From Han Dynasty, China 2. (open) up the Silk Road and it 3. (great) strengthened the communication between China and the outside world. Since then Chinese businessmen have been promoting to other countries Chinese goods of high quality, among 4. silk is one of the most popular goods. As 5.matter of fact, silk has a long history, 6. (date) back to the Neolithic Age(新石器时代). Silk is made of silkworm cocoon. It is not only elegant but also 7. (environment). It can be made into various products by 8. (design) and has been well received at home and abroad.

At present, Chinese government has put forward “The Belt and Road” Initiative, which encourages cooperation between China and other countries. 9. is no doubt that it will have a great effect on all the relevant countries and contribute 10. the economic and cultural development of the whole world.