Scientists think that there has been life on Earth for years. A. millions B. millions of C. million of D. million 题目和参考答案——青夏教育精英家教网—

题目内容

Scientists think that there has been life on Earth for _______ years.

A. millions

B. millions of

C. million of

D. million

【答案】

【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

考点：约数和确数的表达法

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。

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