Hi! I’m the Beijing-Zhangjiakou railway. Do you want to know my _______?

I appeared in 1909. I’m 114 years old now. The person who made me was Zhan Tianyou. He was a smart man and _______ the railway for many years. He thought China should _______ its railways with no other countries’ help. So he made me, China’s first self-built railway.

At first, trains running on me used steam（蒸汽）. They were very _______. Their top speed was 35 km/h. Then, the trains started to use diesel（柴油）. Later, there were some _______ trains using electricity（电）. But it still took more than three hours to travel（行进）from Beijing to Zhangjiakou, Hebei.

In 2020, a new high-speed railway started on December 30. I was so _______. It helped people travel much faster. The high-speed trains had a top speed of 350 km/h! It took only 47 _______ to travel from Beijing to Zhangjiakou.

In the 2022 Beijing Winter Olympics, Beijing and Zhangjiakou, the two host cities, _______ lots of people from around the world. And the railway played an important role in it.

I feel a little _______ because I’m too old to work these days. ________, people will still keep me as part（部分）of history. And I’m happy about all the changes（变化）in China. Zhan Tianyou must have the same feeling as me.