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____ four years since I joined the Army.

A. There was    B. There is         C. It was             D. It is

＿＿＿＿four years since I joined the army.

A.There was     B.There is     C.It was     D.It is

  ＿＿＿＿four years since I joined the army.

A.There was     B.There is     C.It was     D.It is

________ four years since I joined the army.

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