How Animals Keep Warm
    1.题目：How does the dormouse defend itself against cold in winter？
    答案：C） It sleeps continuously.
    2.题目：What keeps animals alive during hibernation？
    答案：A） The fat stored in their bodies.
    3.题目：During hibernation， animals breathe
    答案：B） at a slower rate.
    4.题目：According to the passage， what is “migration”？
    答案：A） Moving from one palace to another with the season.
    5.题目：How do ermines survive in winter？
    答案：D） They stay in their burrows and live on the food stored there.
    速记口诀：
    动物怎样保暖
    1.睡鼠睡觉御寒冷 ____________________
    2.脂肪使得动物活 ____________________
    3.动物冬眠呼吸慢 ____________________
    4.迁移就是换地方 ____________________
    5.貂住洞穴吃储物 ____________________