题目内容：

阅读下面材料, 在空白处填入一个适当的单词或者括号里单词的正确形式。

Beijing Opera 1. （consider）as a national treasure in China, which 2. （date）back to 200 years ago. The early Qing Dynasty saw the great 3.（develop）of this opera. Qianlong emperor in the Qing Dynasty had 4. interest in the local opera. 5. （celebrate）his eightieth birthday, he asked opera troupes（戏班）6. different places to perform for him in Beijing, so the four big Huiban Opera Troupes entered the capital. 7.（gradual）, they combined with the Kunqu Opera, Yiyang Opera, Hanju Opera and Luantan, and formed the present Beijing Opera.

Beijing Opera is a form of traditional Chinese theatre 8. combines music, performance, and dance. Many audiences from different 9. （country）think that it is the 10. （large）and most influential kind of opera in China and the influence is incomparable in China.