2012年新托福考试语法全面解析三十四

 1．Because air is highly compressible, ____to define a clear upper boundary of the atmosphere.

    (A)it is impossible

    (B)impossible is

    (C)so the impossibility

    (D)is the impossibility

    Key：A

    分析：第一步分析句子完整性，发现句子缺少主语和谓语，很明显A是正确的。

    必要知识点：考点是主谓结构。逗号之前是一个原因状语从句，逗号后面缺乏主谓。答案A。

    参考译文：因为空气高度可压缩，所以要想给大气层定义一个清楚的外延是不可能的。

    2．BASIC, the acronym for Beginner's All-purpose Symbolic Instruction Code, is a high - level Instruction Code, is a high - level computer programming language_____.

    (A)learning relatively simple

    (B)related it simply to learning

    (C)simple and relative to learn

    (D)that is relatively simple to learn

    Key：D

    分析：第一步分析句子完整性，发现主谓齐全。第二步观察四个选项，只有D是从句形式，所以这里D是正确的。

    必要知识点：考点是定语成分。题干中有了完整的主谓宾，要填的内容有两种可能：1.作为句子的一个成分(定语，状语等) ；2.从句(要有连接词，完整的主谓宾)。 从意思上可以看出，答案D，定语从句。

    参考译文：BASIC是Beginner's All-purpose Symbolic Instruction Code的首字母缩写，它是一学起来想对简单的高级计算机编程语言。

    3. ______ Frances Perkins held the post of labor secretary for twelve years.

    (A)The first woman appointed by a United States President to a cabinet position was

    (B)The first woman appointed by a United States President to a cabinet position

    (C)Appointed by a United States President to a cabinet position was the first woman who

    (D)The first woman was appointed by a United States President to a cabinet position who

    Key：B