历年托福考试语法真题全面解析04

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16. Not woman held a presidential cabinet position in the United States until 1933, when Frances Perkins became secretary of labor.
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答案：A
测试点：否定词。
分析：no，not以及none这三个否定词的用法，常在题中故意混淆。副词not不能修饰名词woman，此外应用形容词no。
# @. e/ u# {- D% w1 H解题要点：no或not出现在TOEFL改错题中，应首先考虑其是否正确。
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17. The human body relies on certainty nutrients for its survival.  
  
答案：C
测试点：词性。
. X* ]7 A4 W- P( ^5 K/ I4 q0 d分析：此处修饰名词nutrients要用形容词certain，不用名词certainty.
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' [0 x5 X+ \" T1 O9 X$ f18. Too much electric current may flow into a circuit as a result either of a fault in the circuit and of an outside event such as lightning.
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答案：D
- [/ F# C1 ^  m6 m3 L测试点：连词短语
分析：either…or…的用法。看到either这个词，要注意寻找其后是否有相应的or。and应为or。
4 l1 b" |2 ^* P5 a- k# X4 O* ]0 o解题要点；either…or，neither…nor, both…and等连词习语为TOEFL常考题型，注意其前后搭配。
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19. The Appalachian Trail, extending approximately 2,020 miles from Maine to Georgia, is the longer continuous marked footpath in the world.
  
答案：C
测试点：最高级。
分析：形容词或副词前有the，后有in the world等表示范围—类的短语，应当用最高级形式。此处longer应为longest。
解题要点；当TOEFL改错题中出现划线的形容词或副词的比较级或最高级形式时，应注意其用法是否正确。
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20. For years, elephants were hunted for food and ivory, and as a result theirs numbers have been greatly reduced.
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答案：B
测试点：词性。
分析：numbers为名词，前面要用形容词性的代词their。theirs为名词性质。