作业帮the high-speed rail line took china about 18 months()()
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/22 00:46:32
the high-speed rail line took china about 18 months()()
the high-speed rail line took china about 18 months()()
the high-speed rail line took china about 18 months()()
to complete
to finish
是填空？