阅读短文,在空白处填入适当的内容或括号内单词的正确形式。 China has changed people's life with its high-speed rail. Chinese people didn't enjoy 1________ (them) for traveling tens of hours by train in the past, but their feelings have changed since they got the new high-speed trains. High-speed rail in China is 2_________ (design) for speeds of 250-350 km per 3________. Compared with ordinary trains, the high-speed trains are 4________ (smart) and more enjoy-efficient, with more space inside. They are completely researched and developed 5________ Chinese people. High-speed rail is developing 6__________ (rapid) in China. Now China has the 7_________ (long) high-speed rail network in the world. In recent years, China has successfully 8_________ (export) high-speed rail technology to many 9_________ (country). The Chinese are 10_________ (pride) of China's high-speed rail.