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题目
题型:不详难度:来源:
Scientists think that there has been life on Earth for _______ years.       
A. millions     
 B. millions of
C. million of
D. million

答案
B
解析

试题分析:此题重点考查数词的表达法,如果有确切的数字 thousand 或million后面直接跟名词,thousand 和million等不用复数,也不用of,而thousands of,millions of直接跟名词或代词,前面不用确切的数字表示约数,根据题意故选B
点评:正确区分是确切数还是不确切数,二者不能混淆,关键是thousand和million加不加s。
核心考点
试题【Scientists think that there has been life on Earth for _______ years.       A. m】;主要考察你对钟点等知识点的理解。[详细]
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