【題目】閱讀下列短文，根據(jù)短文內容填空，在未給提示詞的空白處僅填寫1個適當?shù)膯卧~，在給出提示詞的空白處用括號內所給詞的正確形式填空。

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】

這是一篇說明文。文章主要介紹了野生老虎的瀕危情況以及印度的相關保護措施。印度的老虎數(shù)量從19世紀初的4萬只左右下降到20世紀70年代初的1800只，當時印度啟動了老虎保護計劃。

【1】考查非謂語動詞。介詞后跟名詞、代詞或動名詞作賓語，此處是填動詞ensure的適當形式，故此處選用動名詞ensuring作介詞in的賓語。故填ensuring。

【2】考查序數(shù)詞。“19世紀”的英文表達為the 19th century，由空前的定冠詞the和空后的century及上下文含義可知此處表達的19世紀，故填19th。

【3】考查名詞。句意：甘哈是該計劃下最初設立的9個保護區(qū)之一�！�one of +the +形容詞+名詞復數(shù)”是英語中的固定搭配，表示“……是……的……之一”，故填reserves。

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