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        1. - Air quality in our city is becoming worse and worse.
          - Yes. These days' PM2.5 readings are frightening. We must do something to _______ air pollution.
          A.reduceB.removeC.collectD.gather
          A

          試題分析:句意:——我們城市的空氣質(zhì)量正在變得越來(lái)越糟糕!堑摹_@些日子的PM2.5指數(shù)嚇人。我們必須采取措施減少空氣污染。A. reduce 減少;     B. remove 移動(dòng);    C. collect收集;  D. gather聚集;根據(jù)Air quality in our city is becoming worse and worse.可知空氣質(zhì)量越來(lái)越差,因此要減少空氣污染。故選A。
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