历年托福考试语法真题全面解析64
36. Dams vary in size from small rock barriers to concrete structures many feet height.答案：D
测试点：词性/习语.
分析：表示长度、重量等单位的名词后接形容词，数词+feet long／high是固定短语，不用名词height.
解题要点：表示长、宽、高概念的形容词与其名词形式混淆是TOEFL常考题型．记住下面题型wide-width，long-length，high-height.
37. Even before the human organism developed into their present stage of home sapiens, the beginnings of culture were already evident.
答案：B
测试点；代词数的一致。
分析：此处代词指代单数的organism，不能用复数的their，应用its。
解题要点；代词与其所指代的名词单复数不统一是TOEFL常考题型．应特别注意划线的代词.
38. In the United States, sleds for recreation were first produced commercial in the 1870’s or thereabouts.
答案：C
测试点：词性.
分析：修饰动词produced应用副词，而commercial是形容词．应为commercially.
39. Employments agencies bring together persons qualified for specific jobs and employers who have those jobs available.
答案：A
测试点：名词的数.
分析：名词作定语修饰另一个名词，用其单数形式，不加s．(A)应为Employment.
40. Salmon spend most of their adult lives in salt water, despite they return to their freshwater birthplaces to spawn and die.
答案：C
测试点：词性／连词.
分析：连接两个句子要用连词，而despite是介词，应为while或but．(A)是正确的动词形式，因为主语salmon单、复数同形，而且后文their表明它是复数。
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