7 . 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。
High-speed rail 1 (develop) rapidly in China since the mid-2000s. China's high-speed rail accounts 2 two-thirds of the world's total high-speed railway networks. China's rail 3 (ambitious) just keep growing. The latest addition to the country's railway network is a high-speed train line, connecting the cities of Zhangzhou, Xiamen and Fuzhou, all three of 4 are in Fujian Province.
The first train on this line started operating on September 28, 2023, 5 (depart) from Fuzhou, the province's capital. Travel time between Fuzhou and Xiamen, 6 popular tourist destination, will be under an hour. The new railway currently has 84 bridges, 29 tunnels, 7 a section of the track that goes over the sea, making it the 8 (country) first over-water bullet train. Official state news agency Xinhua notes that ground transportation in Fujian Province has been 9 (challenge) due to it mountainous terrain (地形) . 10 (make) the operation of this new line is a significant milestone for the province. China's continuous investments in its railway network will contribute to the country's overall economic growth and development.