Some colors people see late at night could cause signs of the condition mental health experts call clinical depression(临床抑郁症). That was the finding of a study that builds on earlier study findings. They show that individuals who live or work in low levels of light overnight can develop clinical depression.
Doctors use the word clinical depression to describe severe form of depression. Signs may include loss of interest or pleasure in most activities, low energy levels and thoughts of death or suicide.
In the new study, American investigators designed an experiment that exposed hamsters（仓鼠）to different colors. The researchers chose hamsters because they are nocturnal, which means they sleep during the day and are active at night. The animals were separated into four groups. One group of hamsters was kept in the dark during their night-time period. Another group was placed in front of a blue light, a third group slept in front of a white light, while a fourth was put in front of a red light. After four weeks, the researchers noted how much sugary water the hamsters drank. They found that the most depressed animals drank the least amount of water.
Randy Nelson, at Ohio State University, says animals that slept in blue and white light appeared to be the most depressed. “What we saw is that these animals didn’t show any sleep interruptions at all but they did mess up biological clock (生物钟) genes and they did show depressive sign but if they were in the dim red light, they did not.” He says there’s a lot of blue in white light. This explains why the blue light and white light hamsters appear to be more depressed than the hamsters seeing red light or darkness.From the text we know that ________ made the hamster feel depressed.
| A．the amount of the water | B．the colour of the light |
| C．the loss of pleasure | D．the level of energy |
What was the purpose of the experiment on hamsters?
| A．To show how well they slept. |
| B．To see how much sugary water they drank. |
| C．To explain why they liked dark colours. |
| D．To find out what caused the depression on them. |
The author explains the clinical depression by _________.
| A．reporting an experiment process |
| B．presenting research data |
| C．setting down general rules |
| D．giving his own experience |
Where can we probably find the text?
| A．In a science magazine. |
| B．In a physics textbook |
| C．In a tourist guidebook. |
| D．In an official announcement. |
A beautiful woman took a plane on business. She found her seat and sat down next to a young man. The man was just thinking of making a few dollars on the plane. When he saw the woman, he got an idea.
“Hey! Would you like to play a game?” he asked the woman. “No, thank you. I just want to take a nap (打盹),” the woman answered.
“It’s really easy. All you have to do is to answer the questions that I ask you. If you don’t know the answer, you give me five dollars. If I don’t know the answer to your question, then I’ll give you five dollars.”
“No,” the woman still refused.
“OK. If I don’t know the answer to your question, I’ll give you five hundred dollars. How about that?” the man said. Then the woman became interested and decided to join in the game.
“OK. How many moons does Jupiter (木星) have?” asked the young man. The woman reached into her purse and took out a five-dollar bill.
“What goes up the mountain with three legs and comes back with four?” the woman asked. Then the young man took out his computer and searched the Internet for an answer. Minutes later, the young man handed five hundred dollars to the woman.
After a few hours, the young man really wanted to know the answer to the question. So he asked the woman, “What is the answer to your question?” The woman reached into her purse and handed the young man a five-dollar bill.Why did the man ask the woman to play a game?
| A．He wanted to show his kindness. |
| B．He wanted to have a pleasant journey. |
| C．He wanted to earn some money from it. |
| D．He wanted to make friends with the woman. |
How much did the woman get at the end of the story?
| A．$ 500. | B．$ 5. | C．$ 10. | D．$ 490. |
What can we learn from the last paragraph?
| A．The woman told the man the answer to her question. |
| B．The woman gave the man’s money back to him. |
| C．The woman asked the man another question. |
| D．The woman didn’t know the answer, either. |
We can learn from the story that the woman is ______.
| A．clever | B．friendly | C．polite | D．honest |
Looking back on my childhood, I believe that naturalists are born and not made. Although we were all brought up in the same way, my brothers and my sisters soon gave up their flowers and insects. Unlike them, I had no ear for music and languages. I was not an early reader and I could not do mental arithmetic (算术).
Before World War I we spent our summer holidays in Hungary. I have only the dim(暗淡的) memory of the house we lived in, of my room and my toys. Nor do I recall clearly the large family of grandparents, aunts, uncles and cousins who gathered next door. But I do have a crystal(水晶)clear memory of the dogs, farm animals, local birds, and above all, insects.
I am a naturalist, nor a scientist. I have a strong love for the natural world and my enthusiasm (热情) has led me into varied investigations (调查). I love discussing my favorite topics and enjoy burning the midnight oil reading about other people’s observations and discoveries. Then something brings these observations together in my mind. This has resulted in my publishing 300 papers and books.
But curiosity(好奇心), a keen (敏锐的)eye, a good memory and enjoyment of the animal and plant world do not make a scientist. A scientist, up to a point, can be made. A naturalist is born. If you can combine the two, you get the best of both worlds.The first paragraph tells us the writer .
| A．was interested in flowers and insects in his childhood |
| B．lost his hearing when he was a child |
| C．didn’t like his brothers and sisters |
| D．was born into a naturalist’s family |
The writer can’t clearly remember his relatives probably because .
| A．he didn’t live very long with them |
| B．the family was very large |
| C．he was too young when he lived with them |
| D．he devoted himself to observing nature |
It can be inferred from the passage that the writer was .
| A．a scientist as well as a naturalist |
| B．not a naturalist but a scientist |
| C．only a born naturalist |
| D．first of all a scientist |
Can we give a hand to those endangered animals? Yes, we may only do a little bit, but together our small actions add up to a lot.
1. Protect wildlife habitat.
Perhaps the greatest threat that faces many species is the widespread destruction of habitat. Cutting down forests, farming, and development all result in loss of wildlife habitat. In areas where rare species live, habitat destruction can quickly force a species to extinction. By protecting habitat, entire communities of animals can be protected together naturally. Parks and reserves are now all too often the only habitats that are left untouched by habitat destruction.
2. Reduce the threat of invasive (入侵的) species.
The spread of non-native species has greatly reduced native populations around the world. Invasive species compete with native species for resources (资源) and habitat. They can even prey on native species directly, forcing native species towards extinction.
3. Place decals (贴花纸) on windows.
It is reported that as many as one billion birds in the United States die each year because of collisions (碰撞) with windows. You can help reduce the number of collisions simply by placing decals on the windows in your home and office.
4. Slow down when driving.
Many native animals have to live in developed areas and this means they must move in human-living areas. One of the biggest obstacles (障碍) to them is that created by roads. Roads divide habitat and present a constant risk to any animal attempting to cross from one side to the other. So when you’re out and about, slow down and keep an eye out for wildlife. What would be the best title for this passage?
| A．How animals go to extinction |
| B．The importance of protecting wildlife |
| C．What to do to help save wildlife |
| D．How to protect wildlife habitat |
By writing the underlined sentence, the writer means that _____.
| A．more parks and reserves should be built |
| B．we should have more habitats free of destruction |
| C．there is a need for improvement in parks and re-serves |
| D．parks and reserves are good examples of protecting wildlife |
People are advised to put decals on windows to _____.
| A．decorate the houses and beautify the environment |
| B．protect the windows from birds hitting |
| C．attract more birds to make homes nearby |
| D．avoid birds hitting the windows by mistake |
The underlined phrase “prey on” in the passage means _____.
| A．drive away | B．live with | C．kill for food | D．fight with |
You want to have fun and adventure and so you decide to travel somewhere to do it. Sounds like a simple enough thing. And basically it is. But what is adventure? That is the key here and the answer can be different for different people.
For those who love sports, adventure travel can have a whole different meaning than for those who like history. The physical travel types that you can find include such adventure travel as white water rafting (白浪漂流), kayaking or climbing and hiking to some mountains somewhere. To the hiker, backpacking across Ireland might be their adventure. For this type of person, adventure travel almost always includes something physical. Often the goal is to push their body’s limits and test their individual endurance (耐力).
For those who less want to climb mountains, adventure travel might mean traveling to Nepal and taking in the local festivals. Wine tasting in Italy is also vacation adventure for the more relaxed traveler who enjoys peace and comfort. Anything that is opposite to the normal scope (范围) of the traveler’s lifestyle defines (定义) adventure.
Adventure travel is not necessarily a one-size-fits-all type of vacation. Adventure depends on the person’s physical limits, how much money the person has and what the person enjoys doing. Going beyond the normal is adventurous for many. If your life is quite busy, then sitting on a beach in the moonlight with your family might be adventure for you. The point is not what you do but that you have a good time and that it is an adventure for YOU — not for the person next to you.
Do not sit home this year when vacation time rolls around. Go beyond your normal routine and try something new. If you usually spend your vacation sunbathing on a beach, try hiking, instead, through the mountains. Look around you, think beyond your comfort zone and head out on an adventure vacation.For a quiet traveler, he is most likely to choose ______.
| A．backpacking across a country |
| B．wine tasting in a bar |
| C．hiking to some mountains |
| D．white water rafting |
To have an adventure travel, the most important is ______.
| A．whether you enjoy yourself |
| B．whether you try something dangerous |
| C．where you go for the traveling |
| D．what you do in the traveling |
From the passage, we can make a conclusion that ______.
| A．adventure travel always includes something dangerous |
| B．adventure travel will cost you a large sum of money |
| C．anything that goes beyond the normal is adventure travel |
| D．adventure travelers like to do things to the limits of their body |
The best title for the passage may be “______”.
| A．Tips on adventure travel |
| B．Who is interested in adventure travel |
| C．What is adventure travel |
| D．Popular places for adventure travel |
When you visit America, you will see the word Motel on signs and notice boards. It is made up of “motor” and “hotel” and it is really a hotel for people who arrive by car (how-ever, you don’t need a car to stay at one). You have to pay when you arrive for your room, which usually has a bath. Meals are not provided, but there will certainly be a cafeteria (自助餐馆). Americans eat a lot of salads and sandwiches. Along the main roads there are a lot of motels. Each tries to offer more than next. Some provide television in every bedroom; others have swimming pools; and so on. Motels are especially useful when you are in the country, far from a town or city. You will also find them in the big National Parks.
In these great National Parks, you may meet guests you don’t expect to see. An American friend told me a little story. In the middle of a moonless night she heard strange noises outside her motel window in the Yellowstone National Park in Wyoming. Thinking it might be a thief, she jumped out of bed, opened the door and crept towards a dark shadow. As she got close, she saw the thief. She was dreadfully frightened: it wasn’t a human thief — it was a big black bear. The bear was turning over some empty tins with its paw, looking for tasty bits of food. My friend decided to leave that particular thief alone!
There are also, of course, places called “rooming houses”, where they receive lodgers (房客). You will see such signs as Tourists or Rooms Rent, and you could try one of these. A word of warning — looking for a room in New York during the tourist season is like looking for gold on the moon! Which of the following is TRUE about motels?
| A．You can only find motels in the big National Parks. |
| B．They are free for people who arrive by car. |
| C．If you want to stay at a motel, you must have a car. |
| D．The word “motel” is formed by two words. |
Which of the following is NOT provided by motels?
| A．Baths. | B．Swimming pools. | C．TV. | D．Meals. |
The underlined word “crept” in the second paragraph probably means “_____”.
| A．moved slowly | B．rushed out | C．threw away | D．ran fast |
From the last paragraph we can learn that in New York during the tourist season _.
| A．tourists can find gold there |
| B．tourists can have a sweet dream there |
| C．it is difficult to find a room there |
| D．there is warning for tourists to New York |