There are animals which do not attempt to leave at the first sign of winter cold. Their instinctive means of defense is to dig out a deep burrow, made soft and warm by padding out with straw, leaves, moss and further. In it they have a secret place containing food which they hope will last the winter through! Animals which fall into this class include the Arctic fox, the rabbit and the ermine, and the little field-mice.

　　1. How does the dormouse defend itself against cold in winter?

　　A) It moves about to keep warm.

　　B) It grows thicker fur.

　　C) It sleeps continuously.

　　D) It goes to warmer areas.

　　2. What keeps animals alive during hibernation?

　　A) The fat stored in their bodies.

　　B) Their thick fur.

　　C) Their warm burrows.

　　D) Their deep sleep.

　　3. During hibernation, animals breathe

　　A) normally.

　　B) at a slower rate.

　　C) at a faster rate.

　　D) irregularly.

　　4. According to the passage, what is migration?

　　A) Moving from one place to another with the season.

　　B) Living in burrows in winter.

　　C) Travelling in the winter months.

　　D) Leaving ones own country for another.

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