历年托福考试语法真题全面解析16
36. Behavior modification techniques work best with problems that manifest itself in overt actions.答案：C
测试点：代词数的一致。
分析：代词的人称和数要与它所指代的名词一致。此处指代的是复数名词 problems，代词也要用复数的themselves。
解题要点: 代词的单、复数形式也是TOEFL常考的要点，一定要找到它所指代的名词以确定它们的数是否一致。
37. Because they are generally taken simply to obtain a recognizable and relatively clear image, most nonprofessional photographs demand few equipment.
答案：D
测试点：little和few的用法。
分析：这两个词常见相互错用。equipment是个集合名词，不可数，只能用little修饰，不能用few(few修饰可数名词)。
38. At birth, an infant exhibits a remarkable number of motor response.
答案：D
测试点：数的一致。
分析：A number of后加复数名词。此处response应为responses。
39. Common to North America, those cinnamon fern is found in wet places.
答案：B
测试点：数的一致。
分析：修饰词，限定词的数要与其中心词一致。fern是单数，前面不能用复数代词those．应为the。
40. The origins of the Democratic party is often traced to the coalition formed behind Thomas Jefferson in the 1790’s to resist the policies of George Washington’s administration.
答案：A
测试点: 主谓数的一致。
分析：主语是复数的origins，系动词不能用单数的is,要用are。
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