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    【题目】阅读下列短文，根据短文内容填空，在未给提示词的空白处仅填写1个适当的单词，在给出提示词的空白处用括号内所给词的正确形式填空。

    According to the World Wildlife Fund, only about 3,890 tigers are left in the wild. India is home to 70 percent of them, and its role in 【1】 (ensure) the big cat’s survival can’t be understated. Tiger numbers in India are believed to have dropped from about 40,000 at the beginning of the 【2】（19）century to just 1,800 in the early 1970s, when India launched the conservation program Project Tiger. Kanha was one of the original nine【3】 (reserve) set up under that program.

    【答案】

    【1】ensuring

    【2】19th

    【3】reserves

    【解析】

    这是一篇说明文。文章主要介绍了野生老虎的濒危情况以及印度的相关保护措施。印度的老虎数量从19世纪初的4万只左右下降到20世纪70年代初的1800只，当时印度启动了老虎保护计划。

    【1】考查非谓语动词。介词后跟名词、代词或动名词作宾语，此处是填动词ensure的适当形式，故此处选用动名词ensuring作介词in的宾语。故填ensuring。

    【2】考查序数词。“19世纪”的英文表达为the 19th century，由空前的定冠词the和空后的century及上下文含义可知此处表达的19世纪，故填19th。

    【3】考查名词。句意：甘哈是该计划下最初设立的9个保护区之一。“one of +the +形容词+名词复数”是英语中的固定搭配，表示“……是……的……之一”，故填reserves。

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