引證題

引證題是指對關于于文章中作者引用別人的話或是名言，或是他人的觀點等等而設置的問題。做此類題一定要注意看作者所引用的觀點與作者自己的觀點是否一致，如果一致，可從整篇文章的思路推理，如不一致，可從文章的反向考慮。我們在答此類題時，一定要返回原文，仔細比較。例如：

Why don’t birds get lost on their long migratory(遷徙的) flight? Scientists have puzzled over this question for many years. Now they are beginning to fill in the blanks.

Not long ago, experiments showed that birds rely on the sun to guide them during daylight hours. But what about birds that fly mainly by night? Tests with artificial(人造的) stars have proved conclusively that certain night-flying birds are able to follow stars in their long-distance flights.

One such bird─a warbler─had spent its lifetime in a cage and had never flown under a natural sky. Yet it showed an inborn ability to use stars for guidance. The bird’s cage was placed under an artificial star-filled sky at migration time. The bird tried to fly in the same direction as that taken by his outdoor cousins. Any change in the position of the artificial stars caused a change in the direction of his flight.

Scientists think that warblers, when flying in daylight, use the sun for guidance. But stars are apparently their main means of directed flight in the night. What do they do when stars are hidden by clouds? Apparently, they find their way by such landmarks as mountain ranges, coast lines and river courses. But when it is too dark to see these, the warblers circle helplessly, unable to find their way. (2005年12月浙江省大學英語三級考試題)

What does the passage say about warblers’ sense of direction?

A. They are not able to see clearly at night.

B. They get lost under star-filled sky.

C. They lose their way when it is too dark.

D. They usually depend on clouds for direction.

在此篇文章中，作者首先引用了科學家的觀點，即鳥在白天靠太陽導航;接

著又引用科學家的觀點，提到鳥在夜晚靠星星導航。在文章的最后一部分，作者提到在烏云遮住星星的晚上，鳥靠地標導航;但是，當夜晚太黑的時候，鳥看不到地標，就無可奈何了，只好在空中盤旋。不管文章的最后部分是作者的觀點，還是作者引用科學家的觀點，但最后部分卻是作者同意的觀點。C項是對有關次嘴鶯方向感的正確表述，為正確選項。

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