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    “______ did it start?” “About two days ago. ”

    A.How long B.How often C.How much D.When

    D

    解析試題分析:句意:它什么時間開始的?兩天前。How long“多長時間”, How often詢問頻率,表示“多久一次”,How munch“多少錢”, When“什么時候”, 根據(jù)下文,“大約兩天以前”,可知上文“什么時候開始的?”,故選D。
    考點:考查疑問詞辨析。

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