托福阅读推断题

2023-09-02 22:02:3903:19 109

声音简介

After 1815 improved transportation enabled more and more western farmers to escape a self-sufficient way of life and enter a national market economy during periods when commodity prices were high，the rate of westward migration increased spectacularly.“Old America seemed to be breaking up and moving westward，” observed an English visitor in 1817，during the first great wave of migration. Emigration to the west reached a peak in the 1830's，whereas in 1810 only a seventy of the American people lived west of the Appalachian mountains，by 1840 more than a third lived there.　　What can be inferred from paragraph 1 about western farmers prior to 1815？　

○They had limited their crop production to wheat， corn， tobacco， and cotton.　
○They were able to sell their produce at high prices.　　
○They had not been successful in raising cattle.　　○They did not operate in a national market economy.

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托福阅读的推断一般是直接推断。无需二次推断。例– 工作时间长和工作辛苦的关系。

反向推断 +1+1=2推断