阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

The first UN Chinese Language Day at the United Nations 【小题1】 (observe) on Friday at UN Headquarters in New York in 2010.【小题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 【小题3】 (official) marked day of Mandarin language celebration was set by the United Nations as a way of celebrating the language’s history and 【小题4】 (contribute) to the world. It is hoped that having one day every year 【小题5】 (celebrate) Mandarin will encourage more people around the world to take it up. With China likely to become the 【小题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 【小题7】 (fall) on April 20.A great way to get 【小题8】 (involve) in the celebration is to join a Mandarin class or attend one of the many Confucius Institutes (孔子学院) 【小题9】 are set up by China in countries around the world. The number of people learning Chinese is on 【小题10】 increase in China’s neighboring countries, such as Korea, Japan, and Vietnam.