The college entrance examination is just around the corner. Homework and tests will keep many of you up late at night, and you may plan to make up for your lost sleep during the weekends. {#blank#}1{#/blank#} is it useful? A study published in the journal Current Biology completely has changed {#blank#}2{#/blank#} people used to think. It shows that the habit of sleeping in on weekends doesn't fix the damage done by a lack of sleep during the week. Even {#blank#}3{#/blank#} (bad), it may damage your health.

D

With the completion of the Human Genome（基因组）Project more than 20 years ago, and the discovery of the double helix structure of DNA enjoying its 70th birthday last year, you might assume that we know how life works. Think again!

Evolution has a 4bn-year head start on us. However, several aspects of the standard picture of how life works-the idea of the genome as a blueprint, of genes as instructions for building an organism, of proteins as precisely tailored molecular（分子）machines and more-have wildly reduced the complexity of life. 

In the excellent book How Life Works, Philip Ball explorers the new biology, revealing life to be a far richer, more delicate affair than we have understood. Ball explains that life is a system of many levels-genes, proteins, cells, tissues, and body modules-each with its own rules and principles, so there is no unique place to look for an answer to it. 

Also, How Life Works is a much more appealing title than the overused question of "What is life?". We should be less concerned with what a thing is, and rather more focused on what a thing does. Defining a living thing implies an unchangeable ideal type, but this will run counter to the Darwinian principle that living things are four-dimensional, ever changing in time as well as space.

But it's an idea that is deeply rooted within our culture. Ball points out that we rely on metaphors（比喻）to explain and explore the complexities of life, but none suffice. We are taught that cells are machines, though no machine we have invented behaves like the simplest cell; that DNA is a code or a blueprint, though it is neither; that the brain is a computer, though no computer behaves like a brain at all.

Ball is a terrific writer, pumping out books on incredibly diverse subjects. There's a wealth of well-researched information in here, and some details that are a bit chewy for the lay reader. But the book serves as an essential introduction on our never-ending quest to understand life.

Lily loved school. However, there was one class Lily worried about more than any other—art. She didn't know why she just wasn't any good at drawing, painting, or cutting.

Ms. Clay, the art teacher, stood at the front of the room. "Class, next Friday our school is going to have an art competition," she announced. Ms. Clay was a great teacher, and Lily liked her a lot. But this announcement made Lily nervous. "Everyone in the school will create a piece of artwork to show in the library. You can use the different types of artwork we have been studying." Ms. Clay was quite excited when she spoke while Lily found herself sinking lower in her chair.

Lily had the whole weekend to work on her project, but she could not think of anything to do. On Monday, Lily felt frightened, so after school Lily asked Ms. Clay if she could write an art paper instead of doing an art project.

"I understand this project scared you, Lily," Ms. Clay said. "Just remember, you can create any kind of art you want." Ms. Clay smiled at her. "Art is a person's way of expressing his or her feelings—it isn't always painting, drawing, or cutting. I know you will think of something very creative, and I can't wait to see it."

When Lily arrived home, she took out a piece of paper and a pencil. She remembered Ms. Clay's words. "Art is a person's way of expressing his or her feelings." Lily wrote the word "terrified" on her paper. She crumpled (揉皱) the paper and threw it to the side of her desk.

Then Lily stared at the crumpled ball. Suddenly an idea struck her.

Paragraph 1：

Why not create something out of crumpled paper?

Paragraph 2：

On Friday, Lily carefully carried her project into the library.

Adults check their phones, on average,360 times a day, and spend almost three hours a day on their devices in total. The problem for many of us is that one quick phone-related task leads to a quick check of our emails or social media feeds, and suddenly we've been sucked into endless scrolling.

It's an awful circle. The more useful our phones become, the more we use them. The more we use them, the more we lay neural（神经的） pathways in our brains that lead to pick up our phones for whatever task is at hand-and the more we feel an urge to check our phones even when we don't have to.

What we do know is that the simple distraction of checking a phone or seeing a notification（通知）can have negative consequences. This isn't very surprising; we know that, in general, multitasking does harm to memory and performance. One of the most dangerous examples is phone use while driving. One study found that merely speaking on the phone, not texting, was enough to make drivers slower to react on the road. It's true for everyday tasks that are less high-risk, too. Simply hearing a notification "ding" made participants of another study perform far worse on a task-almost as badly as participants who were speaking or texting on the phone during the task.

It isn't just the use of a phone that has consequences-its me re presence can affect the way we think.

In one recent study, for example, researchers asked participants to either put their phones next to them so they were visible（like on a desk）, nearby and out of sight（like in a bag or pocket）, or in another room. They were found to perform far better when their phones were in another room instead of nearby-whether visible, powered on or not.

Strategies to Overcome Self-Doubt Once and For All

Being self-confident is not easy and not everyone can do it, but it doesn't need to be that difficult. {#blank#}1{#/blank#}

Going through life can be very challenging at times. When we were young, no one told us how hard it will be in the future but here we are {#blank#}2{#/blank#} And it is unpleasing and can kill your confidence levels if not controlled from the beginning.

We will all experience some self-doubt, which is natural. {#blank#}3{#/blank#} It happens to us during normal days or whenever we are going to start a new job, a new task, or a new relationship, anything new in life will make you self-doubt. This sort of feeling puts you into dark days when nothing seems to go right and you might feel like giving up, and that is the time to be strong.

 {#blank#}4{#/blank#} Self-doubt is when you are unsure about one or more aspects of yourself. For example, when starting a new job, you might feel inexperienced or might think that you are not fit enough for the job, and this is a prime example of self-doubt.

 {#blank#}5{#/blank#} Low-level of self-criticism is actually good for you. It motivates you and pushes you to be better in life, to become greater than yesterday. This type of feeling will push you to work harder and faster than before and will also increase your productivity, but it should be a low level of self-criticism. You don't want to punish yourself over things that are beyond your control.

A. We needn't take it seriously.

B. It's impossible for us to deal with it.

C. One of the big problems of adult life is having self-doubt,

D. Self-doubt isn't all that bad, let us tell you why.

E. Let's explore to find ways to remove self-doubt forever.

F. It will take long for us to solve this problem.

G. There are some people mistaking self-doubt for something else.

The popularity of ancient towns in the south of the Yangtze River, such as Zhouzhuang and Wuzhen, has aroused a nationwide trend in the construction of ancient towns. Lin Peng, the director of China's Institute of Ancient Cities and Cultural Studies, pointed {#blank#}1{#/blank#} that there are more than 2,800 developed or developing ancient towns in our country, {#blank#}2{#/blank#} is definitely the highest number globally.

In ancient towns, {#blank#}3{#/blank#} immersive（沉浸式） experience being mentioned here is historical and cultural characteristics—the "ancient" of ancient towns. Apart from visible "special buildings", characteristics also include invisible "culture". Tourists in ancient towns want to see the living {#blank#}4{#/blank#} （condition） of local people, feel the vitality of town life, try characteristic local snacks {#blank#}5{#/blank#} （influence） by geography and folk customs, and understand how long history {#blank#}6{#/blank#} （shape） local culture. Out of modern fast-paced work and life, tourists want to awaken their inner softness with a slow-moving ancient town.

Touring ancient towns is for recreation, relaxation, and pleasure, {#blank#}7{#/blank#} if all the ancient towns in different places are the same and cannot find their own {#blank#}8{#/blank#} （unique）, then ancient town tourism will {#blank#}9{#/blank#} （eventual） decline. Let every ancient town become a unique historical imprint（印记）, so that tourists can find their "poetry and distance" while {#blank#}10{#/blank#} （wander） through the ancient towns. This is the soul that ancient towns need to regain.