问题

When did he work_______the railroad? —From 1904 to 1909.[ ]

A: in
B: on
C: at
D:of

正确答案是：

标签： did , he , when

同类题型

This morning when I walked by the park, I saw many children ___ there.

________ is waiting for you over there. He wants to say thanks to you.

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under ?－My baseball.

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