单项选择题

Until she spoke I hadn't realized she was foreign.

A．她说话了我才意识到她从国外来。
B．直到她说话，我也不知道她是外国人。
C．她要不说话，我还一直不知道她是外国人。
D．她说话了，我才意识到她是外国人。
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单项选择题
Once these were solved, the railroad was established as the best means of land transportation.
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。
单项选择题
The phrases which is which and what is what suggest （）.

A．the Finns are foolish
B．the Finns are simple-minded
C．the Finns take things seriously
D．the Finns don't take precautions against others
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