B

Far from the land of Antarctica, a huge shelf of ice meets the ocean. At the underside of the shelf there lives a small fish, the Antarctic cod.

       For forty years scientists have been curious about that fish. How does it live where most fish would freeze to death? It must have some secret. The Antarctic is not a comfortable place to work and research has been slow. Now it seems we have an answer.

       Research was begun by cutting holes in the ice and catching the fish. Scientists studied the fish’s blood and measured its freezing point.

       The fish were taken from seawater that had a temperature of -1.88℃ and many tiny pieces of ice floating in it. The blood of the fish did not begin to freeze until its temperature was lowered to -2.05℃. That small difference is enough for the fish to live at the freezing temperature of the ice-salt mixture.

       The scientists’ next research job was clear: Find out what in the fish’s blood kept it from freezing. Their search led to some really strange thing made up of a protein never before seen in the blood of a fish. When it was removed, the blood froze at seawater temperature. When it was put back, the blood again had its antifreeze quality and a lowered freezing point.

       Study showed that it is an unusual kind of protein. It has many small sugar molecules held in special positions within each big protein molecule. Because of its sugar content, it is called a glycoprotein. So it has come to be called the antifreeze fish glycoprotein. Or AFGP.

55. What is the text mainly about?

   A. The terrible conditions in the Antarctic.

   B. A special fish living in freezing waters.

   C. The ice shelf around Antarctica.

   D. Protection of the Antarctic cod.

56. Why can the Antarctic cod live at the freezing temperature?

   A. The seawater has a temperature of -1.88℃.

   B. It loves to live in the ice-salt mixture.

   C. A special protein keeps it from freezing.

   D. Its blood has a temperature lower than -2.05℃.

57. What does the underlined word “it” in Paragraph 5 refer to?

   A. A type of ice-salt mixture.             B. A newly found protein.

   C. Fish blood.                                      D. Sugar molecule.

58. What does “glyco-” in the underlined word “glycoprotein” in the last paragraph mean?

   A. sugar           B. ice                    C. blood         D. molecule

第一节    完形填空(共10小题;每小题2分,满分20分)

       阅读下面短文,掌握其大意,然后从21—30各题所给的四个选项(A、B、C和D)中,选出最佳选项,并在答题卡上将该项涂黑。

In Mr. Allen’ class, which is a high school of the New Jersey, all the students have to “get married”. However, the wedding  21       sometimes become so noisy -- Even the two students getting married often begin to laugh -- that the loud laughter drowns out the  22       of the “minister”.

The teacher, Mr. Allen, wants young students to understand that there are many changes that must take place after marrying and believes that the  23       for these psychological and financial changes should be understood before people marry.

Mr. Allen not only introduces his students to main problems faced in marriage such as illness or being out of work, but also  24        them to the difficult and particular problems they will face every day. He wants to introduce young people to all the worries that can bring the  25        point to a marriage. He even makes his students know the problem of  26         and the fact that divorced men must pay child support money for their children and sometimes pay their wives every month.

It has been not easy for some students to see the problems that a  27      couple often faces.  28      they took the course, they had not worried much about the problems of marriage. However, both students and parents feel that Mr. Allen’ s course is  29     and have favored the course publicly. Their statements and letters supporting the class have asked the school to  30       the course again.

21. A. conferences         B. competitions             C. ceremonies            D. celebrations

22. A. whisper                     B. announcement           C. scream                         D. voice

23. A. possibility           B. responsibility            C. need                        D. benefit

24. A. exposes               B. explains                   C. extends                    D. exhausts

25. A. uniting               B. burning                    C. breaking                   D. freezing

26. A. wedding             B. divorce                    C. participation             D. division

27. A. divorced             B. complained            C. quarreled                  D. married

28. A. Until                  B. After                        C. If                                D. Because

29. A. acceptable           B. flexible                    C. valuable                   D. unbelievable

30. A. afford                 B. offer                        C. establish                   D. affect

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