＿＿＿＿four years since I joined the army. A. There wasB. There isC. It wasD. It is
＿＿＿＿four years since I joined the army. A. There wasB. There isC. It wasD. It is
发布时间：2020-08-17 12:54:35
＿＿＿＿four years since I joined the army. A. There was B. There is C. It was D. It is
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A. There was B. There is C. It was (答案→)D. It is 解析：在it ＋be＋一段时间＋before／after／since句型中，before从句中的动作经过该段时间后才会实现；after从句中的动作完成后已经过去了一段时间；since从句中的动作完成后到现在已经有一段时间了。