历年托福考试语法真题全面解析22
26. When does a neutron from one atom collides with the nucleus of another atom, a chain reaction can occur.答案：A
测试点：多词。
分析：此句的when引导时间状语从句，when后应直接加主语，does是多余的。
27. Alike other academic disciplines, sociology has several major sub-disciplines.
答案：A
测试点： like和alike的用法。
分析：这两个词常见相互错用。alike是形容词或副词，而like可以是介词或动词。在句首位置、后接宾语的，应是介词like。
解题要点；见到划线的alike，应首先考虑它是否用错。
28. An enormous variety of information may be obtained from a largest daily newspaper.
答案：C
测试点：词形。
分析：冠词a后的形容词不能用最高级。此处的largest应为large。
29. Before the invention of the clock, people had to reliable on the celestial bodies to tell time.
答案：C
测试点：词性。
分析：Had to后要接动词原形，而reliable是形容词。应为动词rely。
30. How many people remember listening to Orson Welles’1938 radio broadcast. “The War of the Worlds,” Which convince thousands that space aliens had invaded the Earth?
答案：D
测试点：时态。
分析：从句主语which代指的是1938 radio broadcast，谓语动词不能用现在时。convince应为过去时的convinced。(A)(B)remember+动词-ing形式，指“记得曾做过某事”，无误。
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