大学英语考试完形解题步骤（二）

三、借助语法知识
　　主要是针对上文提到的语法题。再比如：
　　They do not provide energy， ____ do they construct or build any part of the body. （96）
　　A. either B. so C. nor D. never
　　答案：C.
　　分析：这是一常见的否定倒装结构。
　　四、把握文章组织结构
　　主要是针对语篇题。
　　做题时，要把准文章作者发展脉络，文章的起承转合，要注意段落与段落之间，句与句之间的内在逻辑联系，领悟暗示，选对答案。
　　Comparisons were drawn between the development of television in the 20th century and the diffusion of printing in the 15th and 16th centuries. Yet much had happened __21__. As was discussed before， it was not __22__ the 19th century that the newspaper became the dominant pre-electronic __23__. （2002）
　　21. A. between B. before C. since D. later
　　22. A. after B. by C. during D. until
　　23. A. means B. method C. medium D. measure
　　答案：21. A. 22. D. 23. C
　　分析：我们注意到文章讲了两个时间：20世纪和15、16世纪，而19世纪显然是处在两者之间，故21填between.22题是一语法结构题，固定结构：It was not until——that——。23题属于前面介绍的“信息词”题。上文中出现的：television， printing， newspaper均说明该题应填medium.
　　五、复校全篇短文
　　填完20个空格之后，一定不要忘了全文通读一篇，检查句子之间的逻辑关系有无前后矛盾的地方，力避连错几个的现象！