阅读短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。

    Human beings are the most intelligent of all animals because we are gifted with the ability to think and reason logically. Scientists and even common people with special intelligence have made a lot of inventions and contributions to modern lifestyle in the past. “Houses” have been the most popular area for discoveries and inventions in the past and even now.

    Many household items have been the result of inventions of people who desired better functioning of the existent products. Every individual has intelligence and if it is used properly for the right purpose it leads to invention of a new tool or device. Many new household inventions are made almost every day and there are specific companies, which particularly keep a record of all these inventions.

    A lot of inventions have been made recently in the household field. These products are patented(专利的) and have trade mark licenses. The patented sliding cinch is a very simple but effective method to prevent shoulder stress and injury for those who work before computers all day long. Vanity PC is a type of computer furniture that specifically hides all the computer wires and keeps a clean and good look. All the outdoor dust, mud and snow can be kept out of the house by installing(安装) the dirt drain(排水管) at the entrance of the door. Another important invention is the automatic toilet night-light, in which a small light starts when the lid of the toilet seat is opened and closes as soon as the lid is closed.

    These are some of the new household inventions invented mostly by common people. Thus, a variety of new household items are invented every day, which helps in a better functioning of household chores and in a more useful manner.

    Now, I've talked much about education. I've talked about teachers' responsibility for inspiring students and pushing you to learn. I've talked about your parents' responsibility for making sure you stay on track, and you get your homework done, and don't spend every waking hour in front of the TV .I've talked a lot about your government's responsibility for setting high standards.

    But at the end of the day, we can have the most dedicated teachers, the most supportive parents, the best schools in the world-and none of it will make a difference, none of it will matter unless all of you fulfill your responsibilities, unless you show up to those schools, unless you pay attention to those teachers, unless you listen to your parents and grandparents and other adults and put in the hard work it takes to succeed. That's what I want to focus on today: the responsibility each of you has for your education.

    I want to start with the responsibility you have to yourself. Every single one of you has something that you're good at. Every single one of you has something to offer. And you have a responsibility to yourself to discover what that is. That's the opportunity an education can provide.

    And no matter what you want to do with your life, I guarantee that you'll need an education to do it. You want to be a doctor, or a teacher, or a police officer? You want to be a nurse or an architect, a lawyer or a member of our military? You're going to need a good education for every single one of those careers. You cannot drop out of school and just drop into a good job. You've got to train for it and work for it and learn for it.

    That's okay. Some of the most successful people in the world are the ones who've had the most failures. J.K. Rowling's who wrote Harry Potter- her first Harry Potter book was rejected 12 times before it was finally published. Michael Jordan was cut from his high school basketball team. He lost hundreds of games and missed thousands of shots during his career. But he once said, “I have failed over and over and over again in my life. And that's why I succeed.”

And even when you're struggling, even when you're discouraged, and you feel like other people have given up on you, don't ever give up on yourself, because when you give up on yourself, you give up on your country.

    Chimps will cooperate in certain ways, like gathering in war parties to protect their territory. But beyond the minimum requirements as social beings, they have little instinct to help one another. Chimps in the wild seek food for themselves. Even chimp mothers regularly decline to share food with their children, who are able from a young age to gather their own food.

In the laboratory, chimps don't naturally share food either. If a chimp is put in a cage where he can pull in one plate of food for himself or, with no great effort, a plate that also provides food for a neighbor to the next cage, he will pull at random —he just doesn't care whether his neighbor gets fed or not. Chimps are truly selfish.

    Human children, on the other hand are extremely cooperative. From the earliest ages, they decide to help others, to share information and to participate in achieving common goals. The psychologist Michael Tomasello has studied this cooperativeness in a series of experiments with very young children. He finds that if babies aged 18 months see an unrelated adult with hands full trying to open a door, almost all will immediately try to help.

    There are several reasons to believe that the urges to help, inform and share are not taught .but naturally possessed in young children. One is that these instincts appear at a very young age before most parents have started to train children to behave socially. Another is that the helping behaviors are not improved if the children are rewarded. A third reason is that social intelligence develops in children before their general cognitive (认知的) skills, at least when compared with chimps. In tests conducted by Tomasello, the children did no better than the chimps on the physical world tests, but were considerably better at understanding the social world.

    The core of what children's minds have and chimps' don't is what Tomasello calls shared intentionality. Part of this ability is that they can infer what others know or are thinking. But beyond that, even very young children want to be part of a shared purpose. They actively seek to be part of a “we”, a group that intends to work toward a shared goal.

    About ten men in every hundred suffer from color blindness in some way. Women are luckier; only about one in two hundred is affected in this matter. Perhaps, after all, it is safer to be driven by a woman!

    There are different forms of color blindness. In some cases a man may not be able to see deep red. He may think that red, orange and yellow are all shadows of green. Sometimes a person cannot tell the difference between blue and green. In rare cases an unlucky man may see everything in shades of green — a strange world indeed.

    Color blindness in human beings is a strange thing to explain. In a single eye there are millions of very small things called "cones". These help us to see in a bright light and to tell difference between colors. There are also millions of "rods", but these are used for seeing when it is near dark. They show us shape but no color.

    Some insects have favorite colors. Mosquitoes prefer blue to yellow. A red light will not attract insects, but a blue lamp will. In a similar way human beings also have favorite colors. Yet we are lucky. With the aid of the cones in our eyes we can see many beautiful colors by day, and with the aid of the rods we can see shapes at night. One day we may even learn more about the invisible colors around us.

In a study of 33 years of trends in Body Mass Index (体重指数) across 200 countries, the scientists found that people worldwide are getting heavier {#blank#}1{#/blank#}that most of the rise is due to gains in BMI in rural areas. 

BMI is an internationally recognized measurement tool {#blank#}2{#/blank#}

gives an indication of whether someone is a healthy weight. It is calculated by dividing a {#blank#}3{#/blank#} (person) weight in kg by their height in metres squared, and a BMI of between 19 and 25{#blank#}4{#/blank#} (consider) healthy. 

The study found that between 1985 and 2017, average rural BMI increased {#blank#}5{#/blank#}2.1 in women and men. In cities, however, the gain {#blank#}6{#/blank#} (be)1.3 in women and 1.6 in men. The researchers described "striking changes" in the geography of BMI. In 1985, urban men and women in more than three quarters of the countries{#blank#}7{#/blank#} (study) had higher BMIs than men and women in rural areas. But 30 years later, the BMI difference between urban and rural people in many countries had narrowed {#blank#}8{#/blank#} (sharp). 

This may be due to some disadvantages for people {#blank#}9{#/blank#} (live) in the countryside, including {#blank#}10{#/blank#} (low) levels of income and education, higher costs of healthy foods, and fewer sports facilities. 

We high school students do have some growing pains,but we can get rid of them correctly and{#blank#}1{#/blank#} (wise).Some of us are upset{#blank#}2{#/blank#} their body styles and looks.It's unnecessary and it's not important at all.We needn't care about it.It is one's inner beauty{#blank#}3{#/blank#} matters.Second,we sometimes seem to be{#blank#}4{#/blank#}(misunderstand) by our teachers,parents and classmates.{#blank#}5{#/blank#}(face) with this,we can find a proper time to have{#blank#}6{#/blank#} heart-to-heart talk with them,{#blank#}7{#/blank#}(try) to remove the misunderstanding.Some of us have fewer friends.I think being open-minded and{#blank#}8{#/blank#}(friend) will do you good.Third,we may fall behind others,{#blank#}9{#/blank#} makes us stressed.Actually we can encourage ourselves to work efficiently,full of{#blank#}10{#/blank#}(determine).At last,some of us don't have much pocket money,so they feel unhappy.Isn't it strange?So long as we have some,that's enough.And we can learn how to spend money.