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    20．He hurried to the station onlyto find（find ）that the train had left．

    分析 他匆忙赶到火车站，却发现火车已经离开了．

    解答 答案是to find．考查词组only to do sth．表示结果却是…句意是"他匆忙赶到火车站，却发现火车已经离开了．"所以only后面接不定式to find．故答案是to find．

    点评 本题考查用所给单词的适当形式填空．首先要根据语境明确句意，然后再根据相关语法对所给单词在形式上做出正确的变动．

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