历年托福考试语法真题全面解析44

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16. Sociological studies have found that deeply hold values and principles are highly resistant to change.
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0 A: b$ X2 ]  S3 R- V' f答案：B
5 m; n* J+ J3 R3 B0 Y6 U  X测试点：词形.
6 s1 Y3 u' L: m) `% d6 H3 }) s分析：修饰名词values应当用动词的过去分词，而hold是动词原形．应为held.
: K2 k. A' ?0 S8 _* m# c7 @$ S解题要点：分词的作用相当于形容词.
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  I0 j" O6 H) k  z5 ~17. For centuries large communities of people have living on houseboats in parts of the world where the climate is warm and the waters are calm.
  
答案：A
测试点：时态.
分析：Have living是错误用法，应为have been living、
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18. Benjamin Franklin made the first bifocal spectacles for self by sawing the lenses of his eyeglasses in half.
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答案：B
, J* h& c5 w& C. v测试点：反身代词／近义词。
+ r; h* I* H: l5 {2 q8 x( {9 P分析：self为名词，意为“自我，本性”；此处应用反身代词himself指代主语Benjamin Franklin.
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. J& J3 G0 S. f; I4 o, d7 t" _  w19. Not only do artificial reefs provide fish with food and shelter, they also serve as importantly underwater landmarks.
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) f, W2 `; s* q+ p' n+ Z( _2 B: w答案：D
测试点：词性.
1 L! w1 P6 D4 C9 h2 Q( s, q分析：修饰名词landmarks应用形容词，而importantly是副词．应为important.
解题要点：当划线的是-ly结尾的副词时，应注意其是否错用，是否应为形容词.
  
20. The United States Department of Agriculture supervises the quality, clean, and purity of meat.
  
+ a$ T% J; }. H( E4 L! H+ U+ M答案：A
测试点：并列结构.
) x; f+ f+ C& n: U8 T分析：关键词是and，它所连接的部分应同词性、同形式．此处应用名词cleanness与quality和purity并列。