One important early rail line was the Beijing-Zhangjiakou Railway,( complete) in 1909. Other rail lines then under development relied on Western financing and assistance,Zhangjiakou was an important trading post with Russia and the Chinese government felt the line was a high priority, so it decided that the construction should be done all by the Chinese. Hence Zhan Tianyou(give) this important job. When he was 12, he was sent by the government to study in the US,he graduated from high school and Yale University. After his return to China, he gained experience ( work ) on the railroad between Beijing and Shenyang, before being given the (responsible) for building the Beijing-Zhangjiakou Railway. Through his skill, the railroad was finished two years ahead of schedule.

( unfortunate), the development of the Chinese rail networks (be) soon stalled by war.

In the 1950s, the government began renewed push to develop the rail networks repairing damaged lines, filling the gaps and lengthening lines still ( far) so that most of the major cities could be connected.

She hasn't made the decision.

The newly found papers will  what really happened.

  we had got 200 pictures from the spaceship.

As the investigation is going on, she stressed to the media that she would not at present.