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We all know that dinosaurs lived on the Earth more than ______ years ago.

A. sixty million B. millions of C. sixty million of D. million of

 

A

【解析】

試題分析：句意：我們都知道恐龍在地球上生存在6千萬年前。表示確切數字，million不用復數；表示概數，million必須用復數，并且和介詞of連用，所以選A。

考點：考查數詞。

 

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