After spending years searching for a planet with life, scientists may have found one. In September 2010, a team of US scientists discovered an Earth-sized planet called Gliese 581g. It has a surface temperature neither too hot nor too cold for liquid（液态）water. Scientists think there is a chance that the planet could have life.

The planet Gliese 581g goes around a star called Gliese 581, which is about 20 light-years from Earth. That is about 194 trillion（万亿）kilometres －500 million times farther away from us than the moon.

A spacecraft traveling at a one-tenth of the speed of light would reach Gliese 581g within about 220 years. A human can’t live that long, but robotic explorers could make the job easier. However, our fastest spacecraft don’t come anywhere near that one-tenth light-speed mark.

At present, scientists don’t know what the surface might be like on Gliese 581g. What they know is that the planet is at the sight distance from its star to have liquid water. It’s also at the right distance to have an atmosphere that could protect the water if it is on the surface.

Although spacecraft won’t be getting there anytime soon, one way to look for life on Gliese 581g is to turn our radio telescopes（望远镜）towards the planet and search for radiation（放射）. By studying the radiation, scientists would find out about the chemicals（化学物质）around the planet and discover it Gliese 581g has an atmosphere. If it has one, studying the atmosphere would give us a good idea if the planet has life or not. But it’ll probably be many years before we can do this properly.

People have been arguing about whether there is alien life on Gliese 581g. Any discussion about alien life is just guessing at this point, according to its discoverers.

1. What did scientists find in September 2010?

    A. A planet with water.                 B. A planet similar to the earth.

    C. A planet without life.               D. A planet near the earth.

2.According to the article, Gliese 581g ________.

    A. is at the right distance from its star   B. moves around the earth

    C. is as far away from us as the moon       D. can be reached in about 220 years

3. Paragraph 5 is mainly about ______.

    A. the possibility of living on Gliese 581g

    B. the kinds of chemicals around Gliese 581g

    C. the way of looking for life on Gliese 581g

    D. the aim of studying the radiation on Gliese 581g

4.Which of the following is the best title for the passage above?

    A. Gliese 581g, a Likely Living Planet  B. Gliese 581, a Likely Living Planet

    C. Gliese 581g and Its Star             D. Gliese 581g and Radiation

After spending years searching for a planet with life, scientists may have found one. In September 2010, a team of US scientists discovered an Earth-sized planet called Gliese 581g. It has a surface temperature neither too hot nor too cold for liquid（液态）water. Scientists think there is a chance that the planet could have life.

The planet Gliese 581g goes around a star called Gliese 581, which is about 20 light-years from Earth. That is about 194 trillion（万亿）kilometres －500 million times farther away from us than the moon.

A spacecraft traveling at a one-tenth of the speed of light would reach Gliese 581g within about 220 years. A human can’t live that long, but robotic explorers could make the job easier. However, our fastest spacecraft don’t come anywhere near that one-tenth light-speed mark.

At present, scientists don’t know what the surface might be like on Gliese 581g. What they know is that the planet is at the right distance from its star to have liquid water. It’s also at the right distance to have an atmosphere that could protect the water if it is on the surface.

Although spacecraft won’t be getting there anytime soon, one way to look for life on Gliese 581g is to turn our radio telescopes（望远镜）towards the planet and search for radiation（放射）. By studying the radiation, scientists would find out about the chemicals（化学物质）around the planet and discover if Gliese 581g has an atmosphere. If it has one, studying the atmosphere would give us a good idea whether the planet has life or not. But it’ll probably be many years before we can do this properly.

People have been arguing about whether there is alien life on Gliese 581g. Any discussion about alien life is just guessing at this point, according to its discoverers.

1.What did scientists find in September 2010?

A．A planet with water.                     B．A planet similar to the earth.

C．A planet without life.                     D．A planet near the earth.

2.According to the article, Gliese 581g ________.

A．is at the right distance from its star          B．moves around the earth

C．is as far away from us as the moon           D．can be reached in about 220 years

3.Paragraph 5 is mainly about ______.

A．the possibility of living on Gliese 581g

B．the kinds of chemicals around Gliese 581g

C．the way of looking for life on Gliese 581g

D．the aim of studying the radiation on Gliese 581g

4.Which of the following is the best title for the passage above?

A．Gliese 581g, a Likely Living Planet           B．Gliese 581, a Likely Living Planet

C．Gliese 581g and Its Star                   D．Gliese 581g and Radiation

The Green Magic Tree House, in India, is the perfect hotel for anybody who likes adventure（冒险）. Guests must drive for miles through the jungle to find it in the middle of tea and coffee plantation (种植园).
There are two tree houses to choose from, one 30 meters and the other 35 meters above the ground. Both houses have two floors. The bedrooms are above the living area and there are bathrooms and showers. You can get up to rooms and move between floors by using ladders (梯子). You can go from one tree house to the other on a rope bridge. The houses sometimes move about in the wind but the views are fantastic.
Guests can enjoy moving through the jungle, climbing in the mountains, and watching wildlife. There are many unusual plants, birds, and insects in the area.
The Ice Hotel is in Jukkasjarvi, a village in Sweden 200 kilometers north of the Arctic（北极）Circle. Every winter, a team of architects（建筑师）, designers and snow builders build the hotel. This year there are 80 rooms.
Everything is made of ice. The walls, the floors, the ceilings（顶棚）, and even the furniture are made of ice. The beds are made of ice, too, but guests sleep on warm deer skins. Outside it can be -37℃, so inside it feels quite comfortable. The hotel has a bar, where guests can drink vodka（伏特加） from glasses made of ice. It's very popular — because there isn't much else to do.
To spend a night at Jules Underwater Lodge in Florida, guests need to scuba dive (潜水) seven meters under the sea. They enter a small house through a door at the bottom of the building. Inside, the kitchen is stored with food and there is a fridge and a microwave oven(微波炉). There is a hot shower and comfortable beds and lots of books, DVDs and video games. Most guests, however, spend their time at one of the large windows watching different fishes swimming by.
【小题1】The writer tells us three ___________ hotels.

The question whether there is life on Mars (火星) has made the public think a lot for more than a century. The closest look showed Mars to be a dusty, cold world, covered by air too thin to breathe. A British spaceship and Europe's Mars spaceship plan to land on Mars or enter orbit (轨道) around it. One of the NASA’s (美国宇航局) spaceships is expected to land on January 3, the other is going to land on the opposite side of Mars on January 24. Since 1960, over twenty spaceships sent to Mars have failed. Most have been lost on flying up or landing because those are the most difficult times of any flights.     Scientists wanted to find out whether there was water in Mars. In October, a team of scientists reported that Mars had been a dry wasteland. But weeks later, a second team reported differently that they had found some marks showed clearly that they were made by the rivers. Such marks told us that Mars was a warmer place billions of years ago — just as life first appeared here on Earth. Scientists at once raise a question: if what they said is true, what happened on Mars? Then what about the earth?
【小题1】Which is right about Mars?