It _____ ten years since he left the army .  A.is B.has C.will D.was为什么选A

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It _____ ten years since he left the army .  A.is B.has C.will D.was为什么选A
It _____ ten years since he left the army .
  A.is B.has C.will D.was
为什么选A

It _____ ten years since he left the army .  A.is B.has C.will D.was为什么选A
从过去发生某个动作到现在的时间表达有三种说法
1 It is 一段时间 since...
2 It has been 一段时间 since...
3 一段时间 has passed since...
It is ten years since he left the army.
It has been ten years since he left the army.
Ten years has passed since he left the army.

强调句吧,强调时间。自从他退伍已经十年了

强调到(((现在)))15年。

这是一个现在情况陈述事实的句子,所以要用一般现在时!

通常说: It has been ten years since he left the army. 他退役已经十年了。但是如果不强调时间,也可以用一般现在时,并且"十年"被看作一个时间段,一个整体,所以可以用is。这就是为什么选A。祝您学习进步。

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