2 . A recent study has found that using wood for construction instead of concrete and steel can reduce emissions. But Tim Searchinger at Princeton University says many of these studies are based on the false foundation that harvesting wood is carbon neutral (碳中和). “Only a small percentage of the wood gets into a timber (木料) product, and a part of that gets into a timber product that can replace concrete and steel in a building,” he says. Efficiencies vary in different countries, but large amounts of a harvested tree are left to be divided into parts, used in short-lived products like paper or burned for energy, all of which generate emissions.

In a report for the World Resources Institute, Searchinger and his colleagues have modelled how using more wood for construction would affect emissions between 2010 and 2050, accounting for the emissions from harvesting the wood. They considered various types of forests and parts of wood going towards construction. They also factored in the emissions savings from replacing concrete and steel.

Under some circumstances, the researchers found significant emissions reductions. But each case required what they considered an unrealistically high portion (一部分) of the wood going towards construction, as well as rapid growth only seen in warmer places, like Brazil. In general, they found a large increase in global demand for wood would probably lead to rising emissions for decades. Accounting for emissions in this way, the researchers reported in a related paper that increasing forest s between 2010 and 2050 would add emissions equal to roughly 10 percent of total annual emissions.

Ali Amiri at Aalto University in Finland says the report’s conclusions about emissions from rising demand are probably correct, but the story is different for wood we already harvest. “Boosting the efficiency of current harvests and using more wood for longer-lived purposes than paper would cut emissions,” he says. “We cannot just say we should stop using wood.”

1. What is wrong with previous researches according to Searchinger?

A．They got wrong statistics.	B．They were applied in limited countries.
C．They included too many factors.	D．They used an incorrect concept.

2. What does paragraph 2 mainly talk about?

A．The process of the new research.	B．The background of the new study.
C．The challenge of the new research.	D．The achievements of the new study.

3. When will the emissions drop off greatly according to the new study?

A．When the rising global demand for wood is completely met.

B．When the increasing forest harvests are widely restricted.

C．When a high portion of wood is used for global construction.

D．When wood is fully efficiently employed for lasting purpose.

4. What is Ali Amiri’s attitude toward the new result?

A．Favorable.

B．Doubtful.

C．Objective.

D．Critical.

3 . 听下面一段较长对话，回答以下小题。
1. How many cats does the woman want?

A．One.

B．Two.

C．Three

2. What color cat does the woman choose?

A．Black

B．Gray.

C．White.

9 . It sounds like something from the field of science fiction — a space exploration into vast outer space, heading towards the Red Planet While we’re not quite ready to put a person on it, the question we ask today is:     1    

The space race saw the USSR (the Union of Soviet Socialist Republics) and USA compete to achieve firsts in spaceflight. The USSR released Sputnik 1, an artificial satellite, before anyone else,     2     Now it appears that Mars is the body of desire. While to be the first nation to land on it is an obvious draw, there are other reasons why we want to get there.

    3     You only have to look at the fossils of the dinosaurs to see the benefit of finding another habitable planet. While Mars doesn’t have the right conditions to call it home just yet, there's always the concept of terraforming-changing the environment of a planet to suit our needs.

However, not everyone agrees. Leading astrophysicist Neil deGrasse Tyson has said the concept of changing habitability of a planet is not always practical.     4    

It seems that the main reason at the moment is the search for alien (外星的) life.    5     Now seemingly dead, the potential fossils could answer questions about our own evolution and that of our planet. One theory is that bacterial life on our planet didn't start here, but was brought here via asteroid from Mars.

A．and the US landed on the moon first.

B．Instead, it makes no sense when we can simply terraform Earth because of the damage we have done to it.

C．One of these could be the survival of our species.

D．Why are so many countries interested in going to Mars?

E．It has been believed that, at one time, a certain form of life did exist in this red planet.

F．Surely inspiring a new generation to visit the stars is reasonable enough.

G．May landing on Mars inspire more people to become interested in exploring space?

10 . Animal rescuer and cinematographer Douglas Thron’s passion for animals began when he was a little kid and he started rescuing orphaned baby animals. When he grew up, he worked as a cinematographer for shows like Discovery Channel’s “Shark Wee”. But Thron said a fire in California “pushed” him to rescue animals, using his cinematography skills well.

At the time, Thron was working as a cinematographer filming a man who was rescuing cats after the fire using an infrared (使用红外线的) handheld camera. The camera uses heat to detect the animals at night. Thron and the man talked about how incredible it would be to put one on a drone (无人机) to detect animals easily. “The animals’ body temperature will flash on the screen and you can pick them out among the rubble (瓦砾),” explains Thron.

The first animal Thron ever rescued was a dog in the Bahamas after a category 5 hurricane hit there. Thron tested out putting an infrared scope on a drone and found the dog exactly in the middle of the huge rubble pile where hundreds of houses had been destroyed. “I flew the drone over and I found him. I was able to rescue him,” he says.

“My dream is to one day have a large animal rescue farm where I can train others on flying drones and make infrared drones as popular for rescuing animals as helicopters are for rescuing people after a disaster,” he says.

1. Which of the following best describes little Thron?

A．Lonely.

B．Optimistic.

C．Sympathetic.

D．Generous.

2. What does the underlined word “one” in paragraph 2 refer to?

A．A heater.	B．An infrared camera.
C．A flashlight.	D．A temperature detector.

3. What can be inferred from the third paragraph?

A．The dog was reunited with its family.	B．Douglas was injured during the rescue.
C．The Bahamas was hit by the strongest flood.	D．Douglas’ infrared drone test was a success.

4. What can be inferred from the last paragraph?

A．Infrared drones in animal rescue will be popular.

B．More and more people are willing to fly drones.

C．Helicopters will be widely used in rescuing animals.

D．Infrared drones will replace helicopters in disaster relief.