A strong password is a word that is as difficult as possible to guess because it looks like a set of random characters （随机的字符）.

It's wise to use the whole keyboard to mix a password with letters, numbers and symbols. A password of 14 characters or more may be much safer.

The following tips will tell you how to create a strong and safe password:

Tip 1: Think of a sentence that is easy to remember, but difficult to guess. For example: “ My son Peter is five years old and my daughter Tina is one year old.”The whole sentence is so long that it can't be a password, so what you can do is to use the first letter of each word to make a new password that seems to be meaningless. That is “mspifyoamdtioyo”.

Tip 2: Make the password more difficult to guess by mixing big and small letters. One way to do this is to use big and small letters one after another. In this way this new password will be “MsPiFyOaMdTiOyO”.

Tip 3: Still using the sentence above, you can also add numers that are meaningful to you. As a result, the new password will be “Mspi5yOaMdTi1yO”.

Tip 4: Add punctuation（标点符号）and symbols to make the password much stronger. You may use symbols, numbers and punctuation to replace some letters which look similar. For example: “MsPi3y0@MdTi!y0”.(o=0, a=@, 1=!)

任务型阅读。根据材料内容，按要求完成下列各题。

    Mr. King is from America. He and his wife are teachers. They teach English in a middle school in Beijing. They have two daughters. They are twins. Their names are Lucy and Lily. They're twelve. They look the same. They are students, but they are in different schools. Their family has two bikes and a car. One bike is for Lily, the other is for Lucy. Mr. and Mrs. King go to work in their car. They have many friends in China. They sometimes go to the friends' home for supper（晚餐）.

    In the 13th century, the famous Italian traveler, Marco Polo, traveled a long way to China. During his stay in China, he saw many wonderful things. One of the things he discovered was that the Chinese used paper money. In Western countries, people did not use paper money until the 15th century. {#blank#}1{#/blank#}.

    A Chinese man called Cai Lun invented paper almost 2,000years ago. He made it from wood. {#blank#}2{#/blank#} He then put these pieces of paper together and made them into a book.

    {#blank#}3{#/blank#} We use a lot of paper every day. If we keep on wasting so much paper, there will not be any trees left on the earth. Every day, people throw away about 2,800 tons of paper. It takes 17 trees to make one ton of paper. This means that we are cutting nearly 48,000 trees every day.

    Since it takes more than 10 years for a tree to grow, we must start using less paper now. If we don't, we will not have enough time to grow more trees to take the place of those we use for paper.

    {#blank#}4{#/blank#} We can use both sides of every piece of paper, especially when we are making notes. We can choose drinks in bottles instead of those in paper packets. We can also use cotton handkerchiefs and not paper ones. When we go shopping, we can use fewer paper bags. If the shop assistant does give us a paper bag, we can save it and reuse it later.

    {#blank#}5{#/blank#} If we all think carefully, we can help protect trees. But we should do it now, before it is too late.

    Running two miles on the playground isn't a fun thing to do for most students. But students in Miss Brown's class at Mark Twain School in the USA gladly put on their running shoes. They wanted to raise money to help a dog in need.

    Miss Brown told her students about Peter, a dog who had a hard start in life. At less than a year old, Peter's owners found out that he was not healthy. Something was wrong with his body. Medicine could help but it was very expensive. For Peter to have a better life, he needed surgery (外科手术). But his owners couldn't afford that. Finally, they had to leave Peter at the animal hospital.

    "I love dogs and when I hear about Peter, I felt so sad for him," says student Tony.

    Miss Brown's class decided to hold a Jog-a-Thon to raise money for Peter's surgery.

    "At first I felt like the Jog-a-Thon was just to get us to exercise," says Mike "but then I wanted to help this dog."

    "I just wanted to make a difference in Peter's life," adds student Chance Wood.

    News of the Jog-a-Thon spread throughout the school. Before long, five other classes also took part in the event. "I started receiving money from all kinds of people in our school community," says Miss Brown. "We raised $3,180.64 in all."

    Stephen Hawking was born in England in 1942. He's one of the most famous scientists on space and time in the world. He is called the King of the Universe.

    He studied math and science at Oxford University, then he became seriously ill, which made him unable to speak or breathe without the help of machines.

    He went on to study at Cambridge University after graduating from Oxford University. In 1965, he got a Doctor's Degree of philosophy（哲学）. Because of his serious illness, it was difficult for him to draw diagrams or to write. So he started to think in pictures. With this new way of thinking, he is respected by people in the world. Then in 1988, he wrote his first important book, A Brief History of Time. It was sold more than 5.5 million copies in over 33 different languages. He was once invited to China to give lectures（做演讲）. His self-confidence and humouous conversations impressed us deeply.

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A. Wear right clothing. At least, you have to wear a safety helmet.

B. Avoid speeding Use a "Speed Limiter" to control the speed.

C. Keep a safe distance between you and other riders when using the Segway.

D. Keep a firm hold on the Segway at all times. Always have both hands holding the handlebar.

E. Learn how to operate the Segway before using it. Read the user manual carefully.