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。

Looking back over the last decade, China 【小题1】(witness) tremendous changes, which could not have been achieved 【小题2】 the hard work of its people. There are many ways to record the past decade, but the story that, at times, leaves a mark on each person is 【小题3】(sure) the most vivid.

Recently, a man named Zou Yi who has recorded Beijing’s blue sky in the past decade shared 【小题4】(he) observations on the improvement of air quality in China’s capital, as well as his understanding of the efforts behind the brilliant blue skies. His first photo 【小题5】(take) on January 27,2013. He did the same 【小题6】 next day, and the day after that. Every day, Zou Yi takes a picture of Beijing TV Station, a landmark building 【小题7】(locate) in downtown Beijing. A picture is better than a thousand words.

It took London and Los Angeles more than 50 years 【小题8】(deal) with air pollution compared to only a decade for Beijing. The battle against air pollution perfectly shows the Chinese administration’s 【小题9】(determine) and action in building a prosperous and beautiful country, 【小题10】, over the years, has claimed some major stepwise victories thanks to the tough and comprehensive policies.