Ways to sleep smarter

    Studies show that poor sleep influences people to make good decisions, concentrate on tasks or even manage a friendly mood(情绪) at work. {#blank#}1{#/blank#} Today we've got our top favorite sleep tips and facts.

Set a regular bedtime

    {#blank#}2{#/blank#} Choose a time when you normally feel tired. Try not to break this routine(惯例) on weekends when you will probably stay up late. If you want to change your bedtime, make the change gradually, such as 15 minutes earlier or later each day.

Eat the right food

    Some foods are more helpful to a better night's sleep than others. {#blank#}3{#/blank#} Others like bananas, potatoes, and whole-wheat bread are also helpful.

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    Exercising provides lots of good health benefits(好处). A good night's sleep is one of them. But make sure you exercise in the morning or afternoon. The National Sleep Foundation reports that exercise in the morning or afternoon can help deepen sleep. However, those who worked out in the evening hours saw little or no improvement in their sleep.

Reduce(减少) screen time before bed

    {#blank#}5{#/blank#} A recent study shows that people who use electronic media(媒体) just before bedtime report lower-quality sleep even when they get as much sleep as those who don't.

    Radar is an electronic device that detects planes, ships, coastlines, landmarks, and even storm clouds. The name radar comes from the first letters of the words radio direction and ranging. As the human eye uses light waves to see, radar “sees” with radio waves. Without radar, planes could not land safely in bad weather and ships could not move safely in thick fog{#blank#}1{#/blank#}

    In the 1800s it was discovered that radio waves could be reflected from objects. But scientists did not make great advances in radar research until the 1930s, when the world was threatened by war{#blank#}2{#/blank#} It has been used widely in almost every conflict since then.

    Echoes make it possible for radar to work. When a beam of radio waves is sent out, it strikes on an object and returns an echo. This echo is picked up by radar and recorded on a screen similar to television screen. On the screen an observer sees a flash, or a blip, that shows the direction and distance of the object.{#blank#}3{#/blank#}

    Airport control towers use radar to guide planes in for safe landings. Almost all large ships depend on radar to prevent collisions with icebergs or other ships{#blank#}4{#/blank#}Weather forecasters “see” the size, direction, and speed of storms on radar screens. Astronomers can even use radar to measure accurately the distance to the moon. Thus, the device has generated major advancements.

    {#blank#}5{#/blank#}Huge radar antennas have been installed all over the United States. They guard us against possible enemy attacks. We have ballistic—missiles (战略导弹)warning systems that can alert us to attacks when missiles are more than 1,000 miles away. Other radar systems warn us against enemy aircraft and even spying space satellites.

A. Police track speeders in radar-equipped cars.

B. These measurements are now highly accurate.

C. The device can be used in a wide range of fields.

D. It is therefore especially valuable to shippers and travelers.

E. During World War II many countries used radar effectively.

F. Today radar is used by commercial airliners and weather forecasters.

G. Strengthening national defense is one of radar's most important functions.

    Are you preparing any gifts for your friends now? {#blank#}1{#/blank#}, but choosing a proper gift can be a big headache, because it takes a lot of time and effort to think of the right gift for someone. Before you finish your list, keep these dos and don'ts in mind:

    Do put thought into your gift.

    If you like something, that doesn't mean that your friend is going to like it, too. {#blank#}2{#/blank#}. Don't get him/her an ordinary gift, and reflect back on your previous conversations to see if he/ she talked about a certain gift he/she had been wanting to get.

    {#blank#}3{#/blank#}.

    Make sure the gift you're buying is appropriate for the person. For example, if you're buying a friend a gift, remember not to overspend or personalize it too much. Take a moment to think about how your relationship is with the person before getting him/her something.

    Do get a gift receipt (收据)

    If you're purchasing something for your friend, make sure you ask the salesperson to include a gift receipt. It's just a polite gesture, and you know your money won't go to waste.{#blank#}4{#/blank#}.

    Don't leave the price tag (标签) on.

    Make sure you don't leave the price tag on the gift and that you're giving a gift receipt and not the original bill.{#blank#}5{#/blank#}, and it's not important for him/her to know anyway.

A. Don't buy an inappropriate gift

B. Don't be afraid of spending money

C. Giving gifts has forever been so pleasant

D. Take some time to really think about what he/she likes

E. If your friend doesn't like the gift, he/she can just exchange it

F. Giving someone you care about a very special gift can be tough

G. It's not proper to let your friend know how much you spent on the gift

    New rules for middle school students came out in March. Middle schools are going to use a new way to decide who the top students are. {#blank#}1{#/blank#}The following are some of the new rules.

    Tell the truth. Have you ever cheated in an exam? {#blank#}2{#/blank#}That's not something honest students should do.

    Do more at school. Good students love animals and care for other people. April is Bird-loving Month in China. Is your school doing anything to celebrate it? You should join! {#blank#}3{#/blank#}

    Be open to new ideas. Have you ever thought people could live on the moon? Maybe you'll find another earth in space in the future. {#blank#}4{#/blank#}

    Protect yourself. Has a thief ever taken money from one of your classmates? Don't let it happen to you. If you have to go back home late, you should let your parents know.

    Use the Internet carefully. The Internet can be very useful for your study.{#blank#}5{#/blank#}But some things on the Internet aren't for children, so try to look at the good web pages.

A. Don't do it again!

B. Everyone's new ideas are important

C. Students must only work and play alone.

D. Students should not disagree with the teachers.

E. The best students won't only have high marks.

F. You can use the web pages for fun or homework.

G. In that way, you can learn more about animals and how to protect them.

    Have you ever imagined the benefits that a good memory can bring to you? {#blank#}1{#/blank#} Here are four ways to improve your memory.

    {#blank#}2{#/blank#} There is evidence that sleep plays a vital role in the consolidation of memories relating to learning motor skills, such as learning to play a musical instrument or ride a bike. Having a full night's sleep soon after gaining a new skill helps consolidate the processes involved, so they can later be performed well.

    It's rewarding to continue education. Older people are often told to adopt a “use it or lose it” approach to maintaining cognitive (认知的) function. {#blank#}3{#/blank#} In a 2016 study, US researchers found participants aged 60-90 who spent 15 hours a week for three months learning a complex skill, such as digital photography, saw significant improvements in memory tests.

    Taking a break counts. {#blank#}4{#/blank#} More than a century ago, German scientists showed that people performed almost twice as well in memory tests if they took breaks.

It's useful to stay social. Having an active social life delays memory loss as we age, US scientists who asked people in their 50s and 60s to do memory tests every other year between 2001 and 2007 found the decline in recall abilities of their most sociable subjects to be half that of the least well connected. {#blank#}5{#/blank#}

A. Sleeping well helps strengthen memories.

B. Old people should participate in easy activities

C. Yoga, meditation or other relaxation techniques may help.

D. Memories can be destroyed if the brain doesn't have enough rests to sharpen them.

E. In fact, when it comes to memory, research suggests that only certain types of mental activities help.

F. Being able to remember important pieces of information can give you a powerful advantage in your life.

G. Having good friends, volunteering for charities and other forms of social engagement also protect memory.

    When we were kids, if our parents wanted us to stop the screen time, they would turn off the TV. {#blank#}1{#/blank#} They grab the cell phone, the tablet or the laptop. Here we will talk about how to control their screen time.

    First, limit the time they use screens. {#blank#}2{#/blank#} Kids are smart. Once you go back to your daily routine, they will quickly be back on a screen. Because they just don't understand that when you tell them to get off the tablet or computer, you mean for the rest of the day.

    {#blank#}3{#/blank#} It can be going outside to play, reading a fun book or cleaning their room. Presenting them with an alternative helps the under-developed planning part of their little brains get past what they can't do and see what else is possible.

    And third, hide the screen device. That one may not seem very fair. {#blank#}4{#/blank#} If they don't see the device around the house, they can't grab it. This way, works for us adult-types who may be a little too addicted to screens ourselves.

    Ultimately, the best way to help kids recognize how much is too much screen time is to limit our own. Yeah, you may have to stare at one all day for your job, but do you really have to come home and immediately turn on the TV or answer that email on your phone? Don't think your kids aren't taking excuses from your actions. {#blank#}5{#/blank#}

A. Second, give them an alternative.

B. So, it's necessary to set a limited time.

C. It may seem easy, but it can be challenging.

D. Now, kids often have a choice of which screen they want.

E. They watch you just as closely as they watch those screens.

F. Now go to find a screen and turn it off, for you and for your kids.

G. But the phrase “out of sight, out of mind” actually works sometimes.