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        1. According to the latest reports on TV and in the newspaper, food safety is becoming a ____________ serious worldwide problem.
          A.more and moreB.little by littleC.now and thenD.one by one
          A
          四個選項分別表示越來越、漸漸地、不時地和一個接一個的,根據(jù)題意選項A為最佳答案,食品問題變得越來越嚴重。
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