2. 职称英语
  3. As settlers moved to California in the mid-nineteenthcentury, they became c

As settlers moved to California in the mid-nineteenthcentury, they became c

游客2023-08-03  49
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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