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    It ten years since he left the army. A.is B.has C.will D.was 答案: 6.A 可用“It is+一段时间+since从句 来表示. ●Sentence structure training 【查看更多】

     

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    It           ten years since he left the army.?
    [      ]
    A. is          
    B. has          
    C. will          
    D. was

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