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阅读短文，从方框中选择单词填空，使短文意思完整、通顺。部分单词需进行词形转换，每词限用一次。

they be under much come find animal difference outside and

The weather gets colder, days get shorter, and leaves fall off the tree. When winter 1．, people live in warm houses and wear thick coats 2．. But what happens to the animals?

       Some animals sleep for part or all of the winter. It is a special, very deep sleep called hibernation (冬眠). These 3． body temperature drops, and their heartbeat (心跳) and breathing slow down. In autumn, they get ready for winter by eating 4． food than in summer and storing it as body fat. This fat provides 5． with enough energy while they are sleeping. Bears, snakes, frogs 6． even some bugs (甲虫) hibernate.
       Some animals stay active in winter. It is hard for them 7． food. Some of them, like mice, collect extra food in autumn and store it to eat later. Some other animals eat 8． kinds of food as the seasons change.They may live in holes, in trees or 9． the ground to stay warm. Some birds, like wild geese(大雁), fly to the south for the winter. We call this migration (迁徙).
       Nature 10． full of magic. Aren’t the ways that animals get through the winter amazing?