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6．The past three decadeswitnessed（目睹）the rapid development of China's space industry．

分析過去的三十年見證了中國航天事業的快速發展．

解答答案：witnessed
考查謂語動詞．根據所給的漢語提示"目睹"和句子結構可知，此處是謂語動詞，根據時間狀語The past three decadesr可知是一般過去時，"目睹"的英語是witness，故填witnessed．

點評本題考查謂語動詞，解題時首先要根據語境和句子結構來判斷句子的時態，然后根據所給的漢語提示寫出正確答案．

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