It ----- ten years since he left the army .

问题描述:

It _____ ten years since he left the army .
  A.is B.has C.will D.was
为什么选A
1个回答 分类:英语 2014-11-20

问题解答:

我来补答
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.
?
?
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