three years___ a long time for us students.A are B be C is D have been

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three years___ a long time for us students.A are B be C is D have been
three years___ a long time for us students.A are B be C is D have been

three years___ a long time for us students.A are B be C is D have been
c is 时间作主语谓语动词用单数

C is

A
对于我们学生来说，三年是很长的时间。

C
时间、距离等概念作为整体作主语时谓语动词用单数形式。这里3年就是指一段3年长的时间整体，而不偏重“3”这个数量。

选C
three years 随时复数，但它是一个时段，所以用单数
表距离也如此如：
Two huandred miles is quite a long distance for me.
表示一笔钱
Ten dollars is far from enough.
O(∩_∩)O 认同请采纳，不懂继续问。祝学习进步! 谢谢！

答案为 C is。把 Three years 当做一个整体来看，所以是单数。像这种时间、距离等概念作为整体时都要当成单数对待 O(∩_∩)O~

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