历年托福考试语法真题全面解析04
16. Not woman held a presidential cabinet position in the United States until 1933, when Frances Perkins became secretary of labor.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。
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。
17. The human body relies on certainty nutrients for its survival.
答案：C
测试点：词性。
分析：此处修饰名词nutrients要用形容词certain，不用名词certainty.
18. 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.
答案：D
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。
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。
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。
20. For years, elephants were hunted for food and ivory, and as a result theirs numbers have been greatly reduced.
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。
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