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As settlers moved to California in the mid-nineteenthcentury, they became c
As settlers moved to California in the mid-nineteenthcentury, they became c
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2023-08-03
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问题
As settlers moved to California in the mid-nineteenth
century, they became concerning about the S1.______
lack of rapid communication with the eastern United
States. Because the many dangers and hardships of S2.______
crossing the West, mails often did not arrive. The S3.______
most important mail was therefore sent via Panama,
took a month or more. S4.______
In 1860 a stagecoach company decided to meet S5.______
a problem by beginning the Pony Express. The
company hired the bravest riders bought the fastest horses S6.______
to be used as relay teams between Missouri with California, S7.______
and the company promised that mail would be
delivering in ten days. The company established two S8.______
hundred stations along the route on which riders could S9.______
rest and change horse. In fewer than two years, however, S10.______
telegraph lines to San Francisco were completed
and the Pony Express was no longer needed.
选项
答案
把concerning改为concerned。
解析
固定搭配中没有正确使用过去分词。concerning是介词,意为“关于”,相当于about,be concerned about....这个固定词组意为“关心,为……担忧。如:We are all concerned about her safety.(我们大家都关心着她的安全)。
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