79.The underlined part “going bottle free” (in Para.4) means “_______”.

A.making bottled water free　　　　　　　　 　　　　 B.abandoning bottled water

C.recycling used water bottles　　　　　　　　　　 　　　　 D.providing free water containers

78.According to the author, tap water is _______.

A.as safe as bottled water　　　　　　　　　　　　　 　　　　 B.more likely to be polluted

C.healthier than bottled water　　　　　　　　　　 　　　　 D.less convenient than bottled water

77.In the first paragraph, the underlined sentence “It shouldn’t.” suggests that people _______.

A.shouldn’t feel pleased with finishing the water in the bottle

B.shouldn’t feel good about drinking an expensive brand H2O

C.shouldn’t be content with just recycling empty bottles

D.shouldn’t be satisfied with drinking only bottled water

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

　 A.Sugar.　　　　　　　　　　　　 B. Ice.　　　　　　　　　　　　　 C. Blood.　　　　　　　　　　　　　　 D. Molecule.

答案　 68.B　 69.C　 70.B　 71.A

Passage 24

(08·湖北E篇)

Downing the last drop of an expensive famous brand H2O as well as remembering to throw the empty bottle in the recycling bin, makes you feel pretty good about yourself, right? It shouldn’t.Even when the bottles are recycled, there are all kinds of other consequences of swallowing bottled water, says Melissa Peffers, the air-quality program manager for Environmental Defense.

The containers are often filled in faraway lands, then shipped from abroad,pare that with the influence on environment of turning on your tap, filling a glass, and drinking up!

Anyone who is choosing bottled water for health reasons is misguided, says Peffers, “Most bottled water is just tap water.”sider another fact that bottled water is surprisingly expensive, especially when compared with the alternative, which is almost free, and it is astonishing that America’s desire for bottled water seems impossible to satisfy, reaching nearly 30 billion bottles a year.

“My parents’ generation never had bottled water,” says Isabelle Silverman, an Environmental Defense legal adviser.She has made a commitment to going bottle free.“You don’t need to fetch it home from the store, and it’s cheaper,” she adds.

Bottled water’s role as a status symbol needs to change, Peffers points out.So when a waiter at an expensive restaurant offers “And what’s your drink?” that’s no reason to forget your conviction(信念).“Don’t be afraid to say, ‘I’ll have tap.’Say it loud enough that the other tables nearby can hear you,” Peffers says.“And then spend that money on a dessert.”

70. 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.

69. 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℃.

68. 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.

62. The passage is mainly about _______.

A. why humans domesticated horses

B. how humans and horses needed each other

C. why horses came in different shapes and sizes

D. how human societies and horses influenced each other

答案　 59.B　 60.D　 61.C　 62.D

Passage 23

(08·辽宁D篇)

Far from the land of Antarctica (南极洲), 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 secrets. 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 things made up of a protein(蛋白质) 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(分子) 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.

61. Horses contributed to the spread of culture by ______.

A. carrying heavy loads　　　　　　　　　　　 　　　　 B. changing farming methods

C. serving as a means of transport　　　　 　　　　 D. advancing agriculture in different areas

60. The author uses the Shetland horse as an example to show ______.

A. it is smaller than the Clydesdale horse

B. horses used to have gentle personalities

C. some horses have better shapes than others

　 D. horses were of less variety before domestication