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        1. -----_________ you ________ your homework yet? 
          -----Yes, I ________ it ten minutes ago.
          A. Did; do; finished      B. Have; done; have finished        C. Have; done; finished
          C

          試題分析:句意:你已經(jīng)完成了你的作業(yè)了嗎?是的,我是在十分鐘以前完成的。yet 經(jīng)常用于現(xiàn)在完成時:hace done. ten minutes ago十分鐘以前,過去時態(tài)的標(biāo)志詞:主語+動詞的過去式。故選C。
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