The volcano rabbit has the same problem. These rabbits live on the slopes of volcanoes in Mexico, and recent studies have shown that the lower range of their habitat has already shifted upward about 700 meters, but there are not suitable plants for them to move higher, so they are stuck in the middle. Scientists are concerned about their populations.

　　Native to the US, pygmy rabbits weigh less than 1 pound and live in the American West. They are believed to be the smallest rabbits in the world. Their habitats have been destroyed by development. Several populations, such as the Columbia Basin pygmy, almost went extinct and were saved by zoo breeding programs. Pygmy rabbits also rely on winter cover by digging tunnels through the snow to escape predators, but lesser snowfall is leaving them exposed.

　　All of this gives new meaning to dressing up in a giant bunny costume this Easter.

　　68 The writer mentions Easter at the beginning of the passage in order to_______.

　　A. show the importance of Easter Day B. introduce the issue about bunnies

　　C. remind people of Easter traditions

　　D. discuss the relationship between Easter and bunnies 69. The word “culprit” ( Paragraph 2) is closest in meaning to______.

　　A. criminal B. judge C. victim

　　D. producer

　　70. According to the passage, some rabbits can now be easily discovered by predators because they_______

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