However, this tourist attraction will soon 22 .
答案：(D) vanish
語意「這個觀光景點很快就會『消失』」，vanish（消失）符合後文冰川融化的主題；operate（運作）、expand（擴大，語意相反）、recover（恢復）都不合。
vanish 你大概只在魔術或故事裡見過（The rabbit vanished.），一時不確定它能不能用在 tourist attraction 這種抽象的東西上，於是退而求其次，挑比較眼熟的 recover 或 expand。
兩個線索，一個往前看，一個往後看。往前看轉折詞：句首的 However 標示語意反轉。前一句說遊客被冰河的描寫吸引（正面、興盛），However 之後必然轉向負面。operate、expand、recover 三個不是正面就是維持現狀，只有 vanish 是負面。單憑一個 However 就能刷掉三個選項。往後看兩句：Mount Kilimanjaro's snows and glaciers are melting and are likely to disappear by 2020（積雪與冰河正在融化，很可能在 2020 年前消失）。disappear 就是 vanish 的同義字，作者先用 vanish 一句話概括，再用 disappear 具體說明。另外注意主詞 this tourist attraction 指的是「這項觀光吸引力」這件事，不是一棟建築或一部機器，所以更不可能 operate。
operate（運作、營運、動手術）：這個字有三個常見意思——機器或系統「運作」、公司或事業「營運」、醫生「動手術」。營運那一個意思最容易讓人猶豫，因為觀光景點聽起來像是可以「開始營運」的地方；但這座山每年已有數萬遊客造訪，早就在營運了，談不上「即將開始營運」，而且 However 要求語意轉負，營運是中性偏正面，方向也不對。expand（擴大、擴張）：方向與 However 的轉折相反。recover（恢復、康復）：要先受到損害才談得上恢復，這裡損害還沒發生，時間順序不對。
vanish into thin air（憑空消失）、tourist attraction（觀光景點、觀光賣點）、recover from an illness（病癒）、operate on a patient（為病人動手術）、expand into（擴展到…）、melt away（融化消失）。
Every year tens of thousands of tourists visit Mount Kilimanjaro, the highest mountain in Tanzania, Africa, to witness the scenes depicted in Earnest Hemingway's The Snows of Kilimanjaro. They are attracted by the American writer's 21 of the millennia-old glaciers.
However, this tourist attraction will soon 22 . According to the Climate Change Group, formed by environmentalists worldwide to document the effects of global warming, Mount Kilimanjaro's snows and glaciers are melting and are 23 to disappear by 2020.
Not only will the summit lose its tourist attraction, but the disappearance of the snows will also cause major damage to the ecosystem on the dry African plains at its base. 24 the snow covering the peak, there will not be enough moisture and water to nourish the plants and animals below. Rising temperatures, an effect of global warming, 25 threaten the ecosystem of this mountain area. The loss of snows on the 5,892m peak, which have been there for about 11,700 years, could have disastrous effects on Tanzania.