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        1. We _____ more than 1,600 words since we began to learn English.

          A.learn B.have learned
          C.learned D.a(chǎn)re learning

          B

          解析試題分析:句意:自從我們開始學(xué)英語我們已經(jīng)學(xué)了1600多個單詞了,F(xiàn)在完成時表示過去某一時間開始并一直持續(xù)到現(xiàn)在并且有可能還會持續(xù)的動作或狀態(tài)。結(jié)合句意,故選B
          考點:考查時態(tài)的用法

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