根据短文内容，判断下列句子是否正确。

   Cats are the most popular pets among Americans. So it is not surprising there are many expressions about cats. Do you know any of them? Now let me introduce some to you.
   Some cats like to catch small birds, like canaries. If someone looks very proud or satisfied with himself, we say he looks like the cat that ate the canary.
   Sometimes, a cat likes to play with a small animal it catches. So if you play cat and mouse with someone, you change between different kinds of behavior when dealing with another person. For example, a child might offer something sweet to her little brother, and then take it away when reaches for it.
   A cat will often catch a small animal and present it to its owner. The saying “that looks like something the cat dragged in (把…拖进来)” describes something in bad condition.
   A fat cat is a person with a lot of money.
   There are many other expressions about cats in America. How interesting! Which kind of cat are you, or which kind would you like to be?

Is there intelligent life on other planets? For years, scientists said "no" or "we don't know." But today this is changing. Seth Shostak and Alexandra Barnett are astronomers (天文学家). They believe intelligent life exists somewhere in the universe. They also think we will soon contact these beings．

Why do Shostak and Barnett think intelligent life exists on other planets? The first reason is time．Scientists believe the universe is about 12 billion years old．"This is long enough for other planets to have intelligent life， “say Shostak and Barnett．The second reason is size—the universe is huge．“Tools like the Hubble Telescope(哈勃望远镜)have shown that there age at least 100 billion galaxies，”says Shostak．“And our galaxy，the Milky Way，has at least 100 billion stars．Some planets going around these stars might be similar to Earth．”

In the past，it was hard to took for signs of intelligent life in the universe，But now. powerful telescopes(高倍望远镜)allow scientists to discover smaller planets—the size of Mars or Earth—in other solar systems．These planets might have intelligent life．

    Have beings from space already visited Earth?“Probably not．”says Shostak．“It's a long way away．However，intelligent beings may contact us in other way，such as radio signals．In fact，they may be trying to communicate with us now，but we don't have the right tools to receive their messages．However，this is changin9．By 2025，we could make contact with other life forms in our universe and we might help each other．”

    Some researchers explain how most people form their social groups with people of their age. Especially, as children and teenagers, even adults, people make their friends based on proximity (邻近) more than anything else. Even in a college classroom, the students may not make friends with those who have similar personalities and interests. It's the people they really sit next to. Clearly, who stands to you has the greatest influence on you. As Jim Rohn has widely said. "You are average (平均) of five people you spend the most little with."

    Over the past ten months, I've paid Ryan, it Famous writer of several bestselling books, to help with the book I'm writing. Working with him has shown me just how low my standards for my work are. For example, every time I send him a drab (草稿), he shows me how it could     be 10 times better, and he holds me to that standard.

      ▲   It's because that I don't know what I don't know. Working with Ryan has made me realize what is possible and what it takes to create something powerful.

    Like Ryan, my business partner Richard has wonderful ideas and far different experience than I have. He has written 36 New York Times Bestsellers. He's been speaking and doing events for 20 years. Richard always performs at high levels, and he is also very strict with me because my performance is a reflection (反映) on him. It's not a bad thing because it creates high pressure (压力) to help me make great progress in organizing author training.

    In a word, you need to stay with those people who can help you realize your level and potential. Staying with people who have higher standards is the fastest way for you to change. If you don't change your environment, your progress will be very slow. Who you stay with has huge importance. You can't ignore this.

Why Do People Blink (眨眼) Their Eyes?

    People blink their eyes tens of thousands of times every day. Scientists have long believed blinking was an involuntary movement and served mainly to keep the eyeballs wet. But a new study suggests it has a more important purpose.

    An international team of scientists from the University of California at Berkeley studied the blinking of human eyelids. The journal Current Biology published their findings. The team said they found that blinking "repositions our eyeballs so we can stay focused" on what we are seeing. They said that when we blink our eyelids, the eyes roll back into their sockets—the bony area that surrounds and protects the eyes. However, the researchers found the eyes don't always return to the same position (位置). They said this causes the brain to tell the eye muscles (肌肉) to reorganize our eyesight.

    Gerrit Maus is the lead writer of the report. He serves as an assistant professor of psychology at Nanyang Technological University in Singapore. Maus said, "Our eye muscles are quite sluggish (迟缓的) and imprecise (不精确的), so the brain needs to constantly adapt (改编) its motor signals to make sure our eyes are pointing where they should be. Our findings suggested that the brain measures the difference in what we see before and after a blink, and orders the eye muscles to make the needed corrections." The researchers said that without such corrections our surroundings would appear unclear and even jumpy. They said the movement acts "like a steadicam (摄影稳定器) of the mind."

    The researchers said they asked volunteers to sit in a dark room while storing at a small dot on a flat surface. They used special cameras to follow the volunteer's blinks and eye movements. After each blink, the dot was moved one centimeter to the right. The volunteers did not notice this, but the brain did. It followed the movement and directed the eye muscles to refocus on the dot. After the dot was moved in this way 30 times, the volunteers' eyes changed their focus to the place where they predicted it would be.

    Professor Maus said. "Even though the volunteers did not consciously register that the dot had moved, their brains did, and adjusted (调整)with the corrective eye movements. These findings add to our understanding of how the brain constantly adapts to (适应) changes directing our eye muscles to correct for errors in our bodies' own hardware."

    The movie The Martian (《火星救援》) is very popular among space lovers. It shows an astronaut trying to live on Mars.

    Although the idea of living on Mars is great, the reality does not look so good. Mars does not have a friendly atmosphere (大气层) for humans. There is very little oxygen there. And because it is too far away from the sun, it is also very cold there. Sometimes the temperature on Mars can be -133℃. This is much too cold for humans.

    However, scientists say it might be possible to live there even without a good atmosphere. Daytime on Mars is almost the same as Earth's. It means there's enough sunlight to grow plants inside safe buildings. However, they would have to grow in soil from Earth. Mars does not have a strong enough atmosphere to stop the radiation (福射) coming from space, which makes it dangerous to grow things in the soil.

    The radiation also causes problems for our health. One way to live there is to build homes underground or in the rocks on the planet. This can help humans keep away from the radiation and keep warm.

    When could we live on Mars? Scientists are hoping to make it possible to live on Mars. Let's wait and see.