66．What’s the main idea of the last paragraph?

　　　 A．It’s important to drill deep down into lake sediments to collect information.

　　　 B．It’s impossible to prove how climate changes in the Amazon rainforest.

　　　 C．It’s hard to collect information for studies of the past climate in the Amazon rainforest.

　　　 D．It’s necessary to have specialized equipment and machinery to study the past climate.

65．How will the Amazon rainforest react to future climate change?

　　　 A．It’ll get drier and continue to remove CO2 .

　　　 B．It’ll remain steamy ,warm ,damp and thick .

　　　 C．It’ll get warmer and then colder and drier.

　　　 D．There is no exact answer up to present.

64．The underlined phrase “mopping up” in the second paragraph means　　　 .

　　　 A．cleaning up　　　 B．taking in　 C．wiping out　　　 D．giving out

48. The writer asks visitors and drivers to look around when traveling because_________.

A．wild animals may attack cars B．wild animals may jam the road

C．they may see wild animals in the park　　 D．they may see wild animals on ecopassages

答案　 45.D　 46.D　 47.B　 48.D

Passage 77

(05·福建C篇)

Walk through the Amazon rainforest today and you will find it is steamy ,warm ,damp and thick .But if you had been around 15,000 years ago, during the last ice age ,would it have been the same ?For more than 30 years, scientists have been arguing about how rainforests like the Amazon might have reacted(反应)to the cold ,dry climates of the ice ages ,but until now ,no one has reached a satisfying answer.

　　　 Rainforests like the Amazon are important for mopping up CO2 from the atmosphere and helping to slow global warming . Currently the trees in the Amazon take in around 500 million tonnes of CO2 each year; equal to the total amount of CO2 giving off in the UK each year. But how will the Amazon react to future climate change? If it gets drier ,will it still survive and continue to draw down CO2 ?Scientists hope that they will be able to learn in advance how the rainforest will manage in the future by understanding how rainforests reacted to climate change in the past.

　　　 Unfortunately ,getting into the Amazon rainforest and collecting information are very difficult .To study past climate ,scientists need to look at fossilized pollen ,kept in lake muds .Going back to the last ice age means drilling deep down into lake sediments (沉淀物),which requires specialized equipment and heavy machinery .There are very few roads and paths ,or places to land helicopters and aeroplanes .Rivers tend to be the easiest way to enter the forest ,but this still leaves vast areas between the rivers completely unsampled(未取样).So far ,only a handful of cores have been drilled that go back to the last ice age and none of them provide enough information to prove how the Amazon rainforest reacts to climate change.

47. When the writer says that animals seem “to be catching on”, he means_________.

A．animals begin to realize the dangers on the road

B．animals begin to learn to use ecopassages　　　

C．animals are crossing the road in groups

D．animals are increasing in number

46. From the news story, we know an ecopassage is_________.

A．an underground path for cars 　　　 B．a fence built for the safety of the area

C．a bridge for animals to get over a river　　　 D．a pass for animals to cross the road

45. The writer uses the example of “ocelots” to show that_________.

A．wild animals have become more dangerous

　　　 B．the driving conditions have improved greatly

　　　 C．the measure for protecting wildlife fails to work

　　　 D．an increasing number of animals are killed in road accidents

71. What would be the best title for this passage?

A. Plants and Animals　　　　　　　　　　　 B. How Plants Defend Themselves

C. Attacks and Defenses　　　　　　　　　　 D. How Animals Eat Plant Leaves

答案　 68.D　 69.B　 70.C　 71.B

Passage 76

(05·浙江B篇)

Special Bridges Help Animals Cross the Road

----- Reported by Sheila Carrick

Why did the chicken cross the road? To get to the other side.

Most people know this joke. But recently, some people have been much more concerned with how the grizzly bear and mountain lion can cross the road.

Millions of animals die each year on U.S. roads, the Federal Highway Administration reports. In fact, only about 80 ocelots, an endangered wild cat, exist in the U.S. today. The main reason? Roadkill.

"Ecopassages" may help animals cross the road without being hit by cars. They are paths both over and under roads. "These ecopassages can be extremely useful, so that wildlife can avoid human conflicts," said Jodi Hilty of the Wildlife Conservation Society.

But do animals actually use the ecopassages? The answer is yes. Paul Beier of Northern Arizona University found foot marks left by mountain lions on an ecopassage that went under a highway. This showed that the lion used the passage.

Builders of some ecopassages try to make them look like a natural part of an area by planting trees on and around them. Animals seem to be catching on. Animals as different as salamanders and grizzly bears are using the bridges and underpasses.

The next time you visit a park or drive through an area with a lot of wildlife, look around. You might see an animal overpass!

70. How does tobacco protect itself against an attack from a caterpillar?

A. Its leaves fight against the attack by physical means.

B. Its roots send a messenger to discourage the caterpillar.

C. Its roots increase the production of nicotine when it is attacked.

D. Its leaves produce poisonous sand to drive the caterpillar away.

69. To defend themselves, oak trees use________.

　 A. chemical means　　　　　　　　　　　　 B. physical means

　 C. bitter chemicals　　　　　　　　　　　　 D. sandy materials