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18、Over the past 30 years,China        significant changes in comprehensive national strength thanks to the reform and opening-up policy.

    A.witnessed        B.were witnessing

   C.has witnessed   D.will have witnessed

18、C 

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Over the past 30 years,China        significant changes in comprehensive national strength thanks to the reform and opening-up policy.

    A.witnessed        B.were witnessing

   C.has witnessed   D.will have witnessed

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科目:高中英语 来源:2010届高考英语二轮复习跟踪测试:时态和语态专题 题型:单项填空

 Over the past 30 years,China significant changes in comprehensive national strength thanks to the reform and opening-up policy.

A. witnessed                             B. were witnessing

C. has witnessed                         D. will have witnessed

 

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