Winter is coming. It's time for the arctic ground squirrel (北极松鼠) to get her underground home ready. Winter is long and cold in northern Canada. Plants can't grow,so there are no leaves or grass for animals to eat. They must find other ways to live. The arctic ground squirrel “sleeps” the winter away.

   ① For months the ground squirrel has been eating lots of seeds,mushrooms,and berries. Now she is fat. The extra fat will keep her alive through the winter. At last she crawls through a tunnel (隧道) into the nest she has made. She curls up,wraps her tail around herself,and goes to “ sleep. ” Only she won’t really be sleeping. She will be hibernating.

   ② The ground squirrel's body is usually as warm as yours. When she hibernates,her body becomes colder than ice. But she doesn’t freeze. Her heart beats just one or two times each minute. She will take only about three breaths each minute. These changes in the ground squirrel's body let her live through the winter. When she hibernates,she doesn’t need much food.

   ③ The ground squirrel will not stay in hibernation all winter. Her body warms up and becomes active for a few hours once every few weeks. Over the winter,these active times use up more than half of the energy that she worked so hard to store. Why does she do this? Scientists aren’t sure. Some think arctic ground squirrels must warm up in case their bodies need to fight off any germs that would make them sick.

  根据短文内容,完成下面的任务。

1. 根据上下文,画线单词hibernating的汉语意思是

2. 用temperature写出画线句子的同义句。

3. The underlined word “changes” in paragraph three comes from his body's , and.

4. 从下面A - D四个选项中为每一段选择恰当的主旨句,其中有一项多余。

   ①

   A. Colder Than Ice   B. Not Really Sleeping   C. Store food   D. Staying Well

   When I was in school,I was very fat. I thought that nice clothes looked very 1 on me. I was very sad. However,I changed my mind when my friends took me to a 2 one night. At the party my friends all went to dance,3 I thought I would look funny if I danced,so I sat in the comer of the hall and 4 the others dance happily.

   “Don’t you like dancing?” A girl next to me asked.

   “I like it,but I... ”

   “ But you can't,right?” the girl asked 5 I could finish my words.

   “You are right,” I answered. I was happy that the girl helped me find a 6 .

   “Why don't you ask your friends to teach you?” she asked.

   “I am too fat. I won’t look nice if I dance ,” I said.

   Hearing this,the girl said 7 ,“ There are many things we can enjoy in life. Don’t let your shape 8 your life. You should be thankful that you have a 9 body. How I wish that I could dance like you! ”

   It was then that I found the girl 10 in a wheelchair. At that time I felt I was very lucky. Then I stood up and danced with my friends.

1. A. ugly   B. nice   C. dirty   D. good

2. A. meeting   B. party   C. show   D. concert

3. A. or   B. so   C. but   D. and

4. A. helped   B. heard   C. felt   D. watched

5. A. if   B. until   C. before   D. after

6. A. result   B. programme   C. way   D. reason

7. A. sadly   B. slowly   C. sad   D. slow

8. A. stop   B. enter   C. influence   D. improve

9. A. right   B. healthy   C. different   D. bad

10. A. lying   B. sitting   C. standing   D. pushing

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