Secret codes（密码）keep messages private. Banks, companies, and government agencies use secret codes in doing business, especially when information is sent by computer.

    People have used secret codes for thousands of years. {#blank#}1{#/blank#} Code breaking never lags（落后）far behind code making. The science of creating and reading coded messages is called cryptography.

    There are three main types of cryptography. {#blank#}2{#/blank#} For example, the first letters of “My elephant eats too many eels” spell out the hidden message “Meet me.”

    {#blank#}3{#/blank#} You might represent each letter with a number, for example. Let's number the letters of the alphabet, in order, from 1 to 26. If we substitute a number for each letter, the message “Meet me” would read “135520135.”

    A code uses symbols to replace words, phrases, or sentences. To read the message of a real code, you must have a code book. {#blank#}4{#/blank#} For example, “bridge” might stand for “meet” and “out” might stand for “me.” The message “Bridge out” would actually mean “Meet me.” {#blank#}5{#/blank#} However, it is also hard to keep a code book secret for long. So codes must be changed frequently.

A. It is very hard to break a code without the code book.

B. In any language, some letters are used more than others.

C. Only people who know the keyword can read the message.

D. As long as there have been codes, people have tried to break them.

E. You can hide a message by having the first letters of each word spell it out.

F. With a code book, you might write down words that would stand for other words.

G. Another way to hide a message is to use symbols to stand for specific letters of the alphabet.

    Recently some American scientists have given a useful piece of advice to people in industrialized nations．They say people should eat more of the same kind of food eaten by humans living more than 10,000 years ago．{#blank#}1{#/blank#}

    The scientists say that the human life has changed greatly．Our bodies have not been able to deal with these changes in lifestyle and this had led to new kinds of sicknesses．{#blank#}2{#/blank#} So they are called "diseases of civilization"．Many cancers and diseases of the blood system are examples of such diseases.

    Scientists noted that people in both the Old Stone Age and the New Stone Age enjoyed very little alcohol or tobacco, probably none．{#blank#}3{#/blank#} However, a change in food is one of the main differences between life in ancient times and that of today.

    Stone Age people hunted wild animals for their meat, which had much less fat than domestic ones．They ate a lot of fresh wild vegetables and fruits．They did not have milk or any other dairy products, and they made very little use of grains．{#blank#}4{#/blank#} We eat six times more salt than our ancestors．We eat more sugar．We eat twice as much fat but only one third as much protein and much less vitamin C.

    {#blank#}5{#/blank#} But scientists say that we would be much healthier if we eat much the same way the ancient people did, cutting the amount of fatty, salty and sweet food.

 A．Modern people used to suffer from "diseases of civilization".

 B．People today probably don't want to live like our ancestors.

 C．These new sicknesses were not known in ancient times.

 D．Ancient people also got lots of physical exercise.

 E．In that case, they would live much healthier.

 F．But today, we enjoy eating a lot of these.

 G．Stone Age people lived a simple life.

    When it comes to benefits of volunteering, a lot of people think it's all about the warm feelings after helping someone. {#blank#}1{#/blank#} For example, volunteering...

1）Teaches you new skills

    From helping make websites to teaching kids languages, to arranging events for charity, volunteering can really be almost anything.{#blank#}2{#/blank#} And through overcoming these you learn and start to master completely new skills.

2）Can be relevant work experience

    Something that seems to stop many is that experience often seems to be a prerequisite (必备条件) for some jobs.{#blank#}3{#/blank#} There's many a journalist that gets his or her start through volunteering for a college or university paper, and that's not at all the only profession this applies to.

3）Can be therapeutic (治疗的)

    One of my close friends has completely transformed since she started working for disabled kids.{#blank#}4{#/blank#} It allows you to see the world and other people from a whole different point of view, which in turn can make you grateful for what you already have and see your own personal value.

4）Helps you expand your network

    One of the great things for volunteering is that you meet a wide variety of people.  {#blank#}5{#/blank#} Sometimes it's very convenient to have a broad network.

A. Volunteering helps you grow as a person.

B. As it turns out, that's far from the only benefit.

C. Volunteering can actually help you get the experience you need.

D. Volunteering helps you look outside yourself and your problems.

E. It's a way to prove that you've not just been sitting and doing nothing.

F. That means when you get involved in voluntary work, you will face many challenges.

G. You're getting to know people involved in many different walks in life that you wouldn't have had the opportunity to meet otherwise.

    Most drinks stating that they are fruit flavored contain no fruit at all, while most of the rest contain only a small quantity of fruit, according to a study carried by the British Food Commission.

    "Shoppers need to check the labels before buying drinks, though sometimes the actual content can be nonexistent," said Food Commission spokesperson Ian Tokelove. "Food production is highly competitive. {#blank#}1{#/blank#} It will increase profits, and consumers won't always realize they are being tricked."

    Flavorings are focused on the flavors of natural food products such as fruits, meats and vegetables, or creating flavor for food products that do not have the desired flavors. Researchers analyzed the contents of 28 strawberryflavored products sold in stores.{#blank#}2{#/blank#} Of the 11 products that did contain strawberries, five of them contained less than one percent real fruit. In addition, each juice box contained nearly eight teaspoons of sugar.

    {#blank#}3{#/blank#} Let's take jam as an example. Some strawberryflavored jam was labeled as containing no artificial color1 s, flavors, or sweeteners, but it contained ly no strawberries at all.

    {#blank#}4{#/blank#} Consumers have the rights to know clearly about what they have bought. Under current UK law, food packages do not have to distinguish between natural and artificial flavoring. "Describing a product as strawberry flavor and covering the surface of the packet with pictures of strawberries is misleading.{#blank#}5{#/blank#} Unfortunately, it is also legal and widespread," Tokelove said. "It's time to take measures to protect the consumers' rights."

A. They found that about 60 percent of them didn't contain any fruit at all.

B. Even products advertised as more natural often contained no fruit.

C. The products which contain real fruit are popular with people.

D. Actually the product contains just a tiny percentage of strawberry or even no fruit at all.

E. It is important and necessary to demand a small amount of flavoring in the products.

F. If companies can cut their costs by using flavoring, they are likely to do so.

G. The Food Commission suggested all flavors used in a product should be listed on the packaging.

How to stay in a good mood

    It's typical to feel your mood starting to become bad. If you want to be able to stay in a good mood, then you have to form these habits that will keep you feeling happy.

    ⒈Don't take love for granted.

    If you're lucky enough to have a special someone, then you should make your time together meaningful. {#blank#}1{#/blank#}Make time to spend time with your special someone. Being around your loved one has been proven to make people happier.

    ⒉Get regular exercise.

    Regular exercise is one of the most important habits that you need to form {#blank#}2{#/blank#} You can go running three times a week and walk the other four. Just make sure to be as active as you can every day.

    ⒊Spend time with your friends.

    {#blank#}3{#/blank#}Of course, don't always hang out with friends when you have a free moment. Make sure you do make time to see friends at least once or twice a week, if you can.

    ⒋Get enough sleep.

    {#blank#}4{#/blank#} One of the easiest ways to stay in a good mood is to be well-rested. Waking up feeling full of energy will make you feel much more ready to face the day and much more excited about everything ahead of you.

    ⒌{#blank#}5{#/blank#}

    If you want to stay in a good mood, then you have to make sure that you eat three healthy and diverse meals every day. Start off with a healthy breakfast, and don't skip this meal no matter what things happen. Have light snacks throughout the day, like yogurt or fruit, to keep you energetic.

A. Have a healthy eating schedule.

B. Make sure that you sleep for 7-8 hours a day.

C. Do begin with a healthy breakfast in the morning.

D. Hanging out with friends will keep you feeling alive

E. Don't stop doing the things you love with the person you love.

F. However, you don't have to do the same boring old thing every day.

G. Once you start exercising, do the same sports at the regular time every day.

    With modern technology, much written communication tends to focus on the keyboard, but handwriting is still a necessary and important skill.{#blank#}1{#/blank#}Here are some tips for you to improve your handwriting.

    Examine Your Handwriting

    {#blank#}2{#/blank#}Look through your writing to decide what makes it difficult to read or what makes it unattractive. Perhaps you write your letters too small. Check on spacing of letters and words, and proper formation of letters. If your letters are small, put more effort into writing larger letters. If certain letters trip you up, practice those letters separately and within words.

    Write Correctly

    Positioning and technique play a role in how your handwriting looks. Hold the pen between your thumb and first two fingers so that it rests against your fingers. Hold it firmly enough to control the tip but not so hard that it hurts your fingers. Lighter pressure on the paper helps you create smooth lines and focus on your letter formation.{#blank#}3{#/blank#}

    {#blank#}4{#/blank#}

    Letters are formed from several basic strokes(笔划). Practice those strokes separately to get your hand used to forming them. Strokes found in letters include vertical lines, horizontal lines, and circles. Build on those to practice specific letters.

Write for a Purpose

    Teach young children handwriting in meaningful contexts. Use that same idea by picking up a pen to write lists and notes by hand instead of typing. Keep a journal daily with slow, correct strokes.{#blank#}5{#/blank#}These true and sincere writing opportunities make the practice meaningful.

A. Build on Basics.

B. Practice makes perfect

C. Focus on improving your correctness instead of speed

D. Writing at a slower speed also helps you focus on letter formation

E. Put a handwritten letter in the mail to surprise a friend or a relative

F. Handwriting requires your brain, eyes and hands to work together to form letters.

G. Before you can improve your handwriting, you need to know where you're falling apart.