Polar bears live in such environment that is too cold for most animals.  For much of the year, they live and hunt on the ____  (1)  ____ (freeze) Arctic sea ice.  Nature has prepared them for the cold conditions but nothing has prepared them for the danger ____  (2)  ____ threatens (威胁) their only home.

    The polar bears' world is melting.  Polar bears ____  (3)  ____ (suffer) in a warmer world are in danger.  Studies show that the polar ice ____  (4)  ____ (reduce) by 9.8% every 10 years since 1,978. At present, about 20,000 to 25,000 polar bears live in the Arctic.  Polar bears depend on the sea ice for their ____  (5)  ____ (survive).  "The sea ice is more than just the platform that the bears walk ____  (6)  ____," says Andrew Derocher, who studies North American polar bear populations. "Without ____  (7)  ____, they can't exist."

     Some melting and refreezing of the polar ice is natural.  But in a ____  (8)  ____ (warm) world, these cycles speed up, and bears have less time to hunt. ____  (9)  ____ (normal), they have three months in the spring when they gain more weight and the extra fat is used later, ____  (10)  ____ the bears are not actively hunting.  Therefore, it is urgent to protect the environment and maintain the ecological balance.

Online shopping is coming into fashion in most cities, where people are able to make full use of the rapidly-developed internet technology. Nowadays, can we find a person  61  has not experienced online shopping? Definitely not.

Online shopping  62  (welcome) by most people due to various reasons. From the perspective of consumers, it can save some time for people who don’t have much spare time. Just click the mouse, they can get 63  they want while staying at home. For the retailers, it can cut some costs for those who don’t have much circulating funds. 64 (compare) with the traditional trade mode, they don’t have to spend money in renting a house. 65  , there are still some disadvantages on online shopping. First, a face-to-face deal makes online shopping less 66  (rely) and trustworthy. Second, people will lose 67   fun of bargaining.

68  is undeniable  that shopping on the internet has become an irresistible trend in modern society. It’s of great urgency that we need to make the relative laws in accordance 69   the rapid growth of online shopping. Only in this way can we enjoy the pleasure and 70   (convenient) of online shopping without the concern of being cheated.

One morning, I was waiting at the bus stop, worried about  61   (be) late for school. There were many people waiting at the bus stop,  62  some of them looked very anxious and  63  (disappoint). When the bus finally came, we all hurried on board. I got a place next  64  the window, so I had a good view of the sidewalk. A boy on a bike  65  (catch) my attention. He was riding beside the bus and waving his arms. I heard a passenger behind me shouting to the driver, but he refused   66  (stop) until we reached the next stop. Still, the boy kept  67   (ride). He was carrying something over his shoulder and shouting. Finally, when we came to the next stop, the boy ran up to the door of the bus. I heard an excited conversation. Then the driver stood up and asked, “ 68  anyone lose a suitcase at the last stop？” A woman on the bus shouted, “Oh dear! Itˈs  69  (I). ” She pushed her way to the driver and took the suitcase thankfully. Everyone on the bus began talking about what the boy had done, and the crowd of strangers  70  (sudden) became friendly to one another.

Facebook founder Mark Zuckerberg  61 (recent)surprised Chinese students when he spoke to 62   in Chinese．In a talk at Tsinghua University in Beijing，Zuckerberg spoke Chinese for about 30 minutes．63 his Chinese was far from perfect，students and teachers cheered his effort．

C1ayton Dube is the head of the US--China Institute at the University of Southern California．He praises Zuckerberg’s effort and thinks more American CEOs should learn foreign  64 (1anguage)．

“To speak Chinese  65  (mean)you begin to think as Chinese people do．You begin to understand how Chinese speakers have their thoughts  66  (organize)，and how they understand things．And that is a vital step if you’re going to be culturally qualified.”

Zuckerberg’s talk raises a larger question：Is Chinese the language of the future? Could it replace English 67   the world’s international language? Chinese already has the most native speakers of any language．And，China may soon pass the United States as the world’s  68   (1arge)economy．

The study of  69   Chinese language is increasing in the United States and around the  world．In 2009，about 60，000  70   (America)college students were studying Chinese．That is three times as many as in 1990．

Born in Amherst, Massachusetts, to asuccessful family, Emily Elizabeth Dickinsonwas an American poet.She studied at MountHolyoke Female Seminary before 56. ________(return) to her familyˈs house inAmherst whereshe lived 57. ________ peaceful life. She kept intouch with her friends by writing lettersand was58. ________ (willing) to greet guests or, later inlife, even leave her room.

Dickinsonˈs poems are unique for the time shelived in; they contain short lines, typically lacktitles, andoften use half rhyme. Many of herpoems deal 59. ________ themes of death andimmortality(永生).Dickinson wrote about 1,800poems during her lifetime, but fewer than a dozenof 60. ________ werepublished. Although most ofher friends probably knew about Dickinsonˈswriting, they didnˈt know 61. ________ she hadproduced so many poems until after her deathin 1886, when her younger sister Laviniadiscovered the place where the poems werehidden. 62. ________ her sister not discoveredthem, thebroadness of Dickinsonˈs workwouldnˈt have become known.

Dickinsonˈs first collection of poetry waspublished in 1890, the content of 63. ________was heavilyedited by the publishers 64. ________(fit) the conventional poetic rules of the time. Acomplete and mostlyunedited collection of herpoetry became available for the first time in1955. Now Dickinson 65. ________ (consider) tobe one of the most important American poets.

Born in Amherst, Massachusetts, to a successful family, Emily Elizabeth Dickinson was an American poet. She studied at Mount Holyoke Female Seminary before 1. ________ (return) to her family's house in Amherst where she lived 2. ________ peaceful life. She kept in touch with her friends by writing letters and was 3. ________ (willing) to greet guests or, later in life, even leave her room.

  Dickinson's poems are unique for the time she lived in; they contain short lines, typically lack titles, and often use half rhyme. Many of her poems deal 4. ________ themes of death and immortality (永生). Dickinson wrote about 1,800 poems during her lifetime, but fewer than a dozen of 5. ________ were published. Although most of her friends probably knew about Dickinson's writing, they didn't know 6. ________ she had produced so many poems until after her death in 1886, when her younger sister Lavinia discovered the place where the poems were hidden. 7. ________ her sister not discovered them, the broadness of Dickinson's work wouldn't have become known.

  Dickinson's first collection of poetry was published in 1890, the content of 8. ________ was heavily edited by the publishers 9. ________ (fit) the conventional poetic rules of the time. A complete and mostly unedited collection of her poetry became available for the first time in 1955. Now Dickinson 10. ________ (consider) to be one of the most important American poets.

An old carpenter (木匠) was ready 61. ________ (retire). He told his boss of his plan to leave the house-building business to live an easier life with his family. 

The boss was sorry to see his good worker go and asked 62. ________ he could build just one more house as a personal favor. The carpenter said yes, but over time 63. ________ was easy to see that his heart was not in his work. He built the house 64. ________ (care) and used inferior (低劣的) materials. 

When the carpenter finished his work, his employer came to inspect (视察) the house. Then he handed the front-door key 65. ________ the carpenter and said, “This is your house ... my gift to you.”

The carpenter was 66. ________ (shock)!

What 67. ________ shame! If he had known he was building his own house, he would have done it all so differently.

So it is with us. We build our lives, a day at a time, often putting less than our best into the building. But we cannot go back. Someone once 68. ________ (say), “Life is a do-it-yourself project.” Your attitude (态度), and the 69. ________ (choose) you make today, help build the “house” you 70. ________ (live) in tomorrow. Therefore, build wisely!

    Friendship is one of the most important things in everyone’s life. __71__ is very difficult to find a better definition(定义) of friendship. A true friend is the person ___72___ can share all our sadness and double all our happiness. In time of trial(尝试) , he or she is always at our side to give us his or her help and comfort.

     Knowing how ___73___ (value) friendship is, we should be very careful with our choice of a friend. We should choose those people with a good character ___74___ our friends, but we must try to avoid ___75___ (make) friends with a bad man. Besides, we should forgive their mistakes and try to help them as much as possible.

     A true friend can always be  ___76___ (trust), loved and respected. If you tell a friend your secrets, he or she won’t tell ___77___. Friends share their joys and sorrows. They help each other when they are ___78___ trouble, and cheer each other up when they are sad. ___79___ most important thing is that a friend always understands you. In conclusion, ___80___ you have made a good friend, don’t forget him or her.