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

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

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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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成人本科学位英语

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