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2020托福启航班结课测试(仅限电脑,请勿用手机参与)

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25. The selection of Manteno, Illinois, as a stop of the Illinois Central, for example, transformed the site from a crossroads without a single house in 1854 into abustlingtown of nearly a thousand in 1860, replete with hotels, lumberyards, grain elevators, and gristmills.The word bustling in the passage is closest in meaning to
A. commercial
B. wealthy
C. lively
D. modern
26. With theonset of economic depression in the late 1830s, however, state governments scrapped overly ambitious railroad projects.The word onset in the passage is closest in meaning to
A. possibility
B. fear
C. worsening
D. start
Which of the sentences below best expresses the essential information in the highlighted sentence in the passage Incorrect choices change the meaning in important ways or leave out essential information.
A.Ecosystems like the spruce ecosystem in Alaska tend to return to their previous states after disturbances such as pest outbreaks, fires, or major storm events.
B.While ecosystems tend to return to their previous states after disturbances, the Alaskan spruce ecosystem might not if it is disturbed too often or too much.
C.Ecosystems tend to return to their previous states after disturbances, so Alaska might again become covered with woodlands or grasslands.
D.After certain types of disturbances such as pest outbreaks, ecosystems do not always return to their previous states but shift to being woodlands or grasslands instead.
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