(2019•山东) 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 pepole'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 energy-efficient，wish 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 would. 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.