题目内容（请给出正确答案）

[主观题]

Once these were solved, the railroad was established as the best means of land transportat

ion.

A．这些问题一旦得到解决，铁路将成为最佳的陆上运输手段。

B．一旦解决了问题，这条铁路将是最好的陆上交通工具。

C．问题一次性解决，我们将建设一条最好的铁路用于陆上交通。

D．这些问题一旦得到解决，铁路将建成为陆上运输的最好方式。

提问人：网友qq283876581 发布时间：2022-01-07

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