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        1. Pollution is a serious problem. Scientists have _______ some good ways to save it.
          A.come up withB.come onC.come outD.come up
          A

          試題分析:句意:污染是個(gè)嚴(yán)重的問(wèn)題,科學(xué)家們已經(jīng)想出了解決的辦法。A想出(注意,辦法)B繼續(xù)C出來(lái),出版。D走上前,故選A。
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