Module 6 Old and New
课下主题训练自然环境、自然遗产保护
.阅读理解
（2021
德州高三检测）
America's first transcontinental railroad, completed 150 years ago today at Promontory Summit in Utah, connected the vast United States and brought America into the modern age. Chinese immigrants contributed greatly to this notable achievement, but the historical accounts that followed often ignored their role.
Between 1863 and 1869, as many as 20,000 Chinese workers helped build the dangerous western part of the railroad, a windi ...