问题
选择题
—When did he work_______the railroad?
—From 1904 to 1909. [ ]
A. in
B. on
C. at
D. of
答案
答案：B
搜题请搜索小程序“爱下问搜题”
—When did he work_______the railroad?
—From 1904 to 1909. [ ]
A. in
B. on
C. at
D. of
答案：B