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：我們都知道六千萬多年前恐龍?jiān)?jīng)在地球上生存。million、hundred等數(shù)詞在表示具體的數(shù)值時(shí)，要用單數(shù)。millions of則表示數(shù)百萬的意思。故選A。
考點(diǎn): 考查數(shù)詞的用法。

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