19．A great amount of information have been used．

分析 大量的信息已經(jīng)被應(yīng)用．

解答 1．have改成has；考查主謂一致，information是不可數(shù)名詞，謂語動詞要用單數(shù)形式．

點評 本題考查基本知識，平時學習中考生應(yīng)加強基礎(chǔ)知識的應(yīng)用和積累．

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