题目内容：

The first UN Chinese Language Day 1. (observe) on Friday at UN Headquarters in New  York in 2010. 2. the world's most widely spoken language, it seems appropriate that Mandarin (普通话) has one day every year dedicated (把…专用于) to it. This 3. (official) marked day of Mandarin language celebration was set by the United Nations as a way of celebrating the language's history and 4. (contribute) to the world. It is hoped that having one day every year 5. (celebrate) Mandarin will encourage more people around the world to take it up. With China likely to become the 6. (large) economy in the world, it is important that the wider world becomes interestingly more perfect in this wonderful language. Every year UN Chinese Language Day 7. ( fall) on April 20. A great way to get 8. (involve) in the celebration is to join a Mandarin class or attend one of the many Confucius Institutes (孔子学院)9. are set up in countries around the world. The number of people learning Chinese is on 10. increase in China's neighboring countries, such as Korea, Japan, and Vietnam.