Pumas are large, cat-like animals which are found in America. When reports came into London Zoo that a wild puma had been __1__ forty-five miles south of London, they were not taken __2__. However, as __3__ began to __4__, experts from the Zoo felt obliged to __5__, for the descriptions given by people who __6__ have seen the puma were extraordinarily similar. The hunt for the puma began in a small village where a woman __7__ blackberries saw 'a large cat' only five yards away from her. It immediately __8__ when she saw it, and experts confirmed that a puma will not __9__ a human being unless it is __10__. The search __11__ difficult, for the puma was often observed at one place in the morning and at another place twenty miles away in the evening. Wherever it went, it left behind it a trail of dead deer and small animals like rabbits. Paw __12__ were seen in a number of places and puma fur was found clinging to __13__. Several people complained of "cat-like noises' at night and a businessman on a fishing trip saw the puma __14__ a tree. The experts were now __15__ convinced that the animal was a puma, but where had it come from? As no pumas had been reported __16__ from any zoo in the country, this one must have been in the possession of a private collector and somehow managed to __17__. The __18__ went on for several weeks, but the puma was not caught. It is disturbing __19__ that a dangerous wild animal is still at large in the__20__countryside. puma n. 美洲狮 oblige v. 使......感到必须 trail n. 一串,一系列 convince v. 使......信服 disturb v. 令人不安