zhan tianyou died in 1919.(對in 1919提問)
when he died,the chinese opened a museam about his life.(對opened a museam about his life提問)
zhan tianyou worked on the railroad from 1904 to 1909.(對from 1904 to 1909提問)
the goverment didn't want foreign engineers because they wanted a chinese engineers.(對because they wanted a chinese engineers提問)
it was difficult to build because it was in the mountains.(對because it was in the mountains提問)