历年托福考试语法真题全面解析54
26. The first United States citizen to become a professional sculptor was Patience Lovell Wright, which works were executed in wax.答案：C
测试点：从句连接词.
分析：此处的连接词在定语从句中作works的定语，应用whose.
27. A electric current can consist of charges that are positive, negative, or both.
答案：A
测试点：冠词a和an的用法.
分析：electric以元音开头，前面冠词要用an.
28. Progress in the field of optically and new kinds of glass have made it possible to construct photographic lenses with a minimum number of materials.
答案：A
测试点；词性。
分析：In the field of后接名词，而optically是副词。应为optics。
29. In nature, the distributive of plants is obviously related to climate.
答案：B 测试点；词性.
分析：在冠词the与介词of之间的，不可能是单个的形容词，而应是名词．此处应用distribution作句子主语.
解题要点：见到the／a…of之间的划线词，应注意它是否为名词.
30. The United States Constitution requires that the President be a natural-born citizen, thirty-five years of age or be older, who has lived in the United States for a minimum of fourteen years.
答案：C
测试点：并列结构.
分析：连词旧两边的成份应同性质．or前为表示年龄的短语thirty-five years of age后也应是说明年龄的older，动词be多余．(A)系词be是正确用法，因为前面的动词require要求其宾语从句用原形动词。
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