One hundred years______not a very long period of time in human history, though o

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问题 One hundred years______not a very long period of time in human history, though only a few people can live that long.

选项 A、is
B、are
C、has been
D、have been

答案 A

解析表示时间、距离、重量、价格的复数名词做主语时，谓语动词一般用单数。

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