The Miocene Period lasted from 25 to 11 ______ago.

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问题 The Miocene Period lasted from 25 to 11 ______ago.

选项 A、million year
B、million years
C、millions year
D、millions years

答案B

解析 Million years is correct after the numbers 25 to 11. The noun years is plural, but the numeric term million after a number does not have a plural form.
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