Trees are useful to man in three very important ways. The first important way is that they provide man with food, wood and other products. Trees provide not only man with food, but also many animals with food. Without trees many animals could not live on the earth. It's not easy for man to live on the earth, either.
The second important way is that trees give us shade. On a hot summer day, people are eager(渴望)to have a rest under the shade of a tree after they have walked a long way. You can imagine how important the shade of a tree is to man and to animals.
The third important way is that trees help to prevent drought and foods. However, in many parts of the world, man has not realized the third important way. He has cut trees down in large numbers. In the end he finds that he has lost the best friends he had.

The Importance of Trees

The First Important Way: {#blank#}1{#/blank#}

The Second Important Way: To give man shade

The Third Important Way: {#blank#}2{#/blank#}

The title   A     {#blank#}1{#/blank#}  American architect
Be born  In   {#blank#}2{#/blank#}  in Seattle, Washington
In college  Studied  architecture  in college
Worked in a fish factory to {#blank#}3{#/blank#}  for college
  {#blank#}4{#/blank#}  a room with 100 other men
His design of buildings Made people feel  {#blank#}5{#/blank#}  and happy
Had  {#blank#}6{#/blank#}  opinions about his buildings
The World Trade Center didn't fall down after a bomb explosion
Successful  career  Was not the  {#blank#}7{#/blank#}   as other architects
Didn't begin his successful career    {#blank#}8{#/blank#}  he started his own company
Won   {#blank#}9{#/blank#}  Awards for his famous design before 1962 and designed over 300 buildings in his life
Date of  {#blank#}10{#/blank#}    Died on Jun,2  1986

Information card

If you receive an e-mail that looks something like this:

    ARE YOU GOING TO CLASS TODAY? How does reading this message make you feel? Why did the sender use all capital letters(大写字母)? Was he or she angry, or did that person just forget to turn off the 'Cap Lock' on the computer? The fact is, this e-mail is usually the way that people shout online. Knowing when and when not to use capital letters is just one example of online etiquette(礼仪) —often called 'netiquette'. Virginia Shea's book, Netiquette, lists a basic set of dos and don'ts for communicating suitably with others on the Internet. Following are some of her suggestions.

    First, always remember that you are sending messages to a real person, not just to a computer. Don't type anything that you wouldn't say to someone's face. Also, remember that the person who receives your message cannot hear the tone of your voice, or see the expression on your face, so make sure your meaning is clear.

    Don't do anything online that you wouldn't do in real life. Don't take anything without paying for it, unless it's free. Don't use information that someone else has written, and say it's yours. Don't read other people's e-mail—you wouldn't open your next-door neighbor's mailbox and open their mail, right? Do share your knowledge of the Internet with others. It's a big place with lots of information, and there are many new things to discover.

    Remember that people judge(判断) you by your words as well as your actions, so try to write well. Good writing skills, as well as correct grammar and spelling, matter(有关系). Send polite, well-written e-mail messages to others. If you're uncertain about how to spell a word or which phrases to use, look it up. There are lots of helpful books and websites.

    It's okay to show your ideas online in forums(论坛) like chat room or message boards, but don't start arguments with people. 'Flame wars' in online discussions can be interesting to read, but are often unfair to other members of the group. Express your opinions, but remember that fighting online or offline is just not suitable.

    When you're online, just as in 'real' life, try to respect(尊重) other people's space, privacy and feelings. Remember, you are not the only one travelling on this highway!

    Teeth are important part of our body. Everyone should brush his or her teeth every day. Learning how to take care of teeth is very important.

    The importance of brushing teeth

    If you eat and do not brush your teeth, pieces of food that stick to your teeth can cause problems. The food can damage (破坏)your teeth. Then germs (细菌)can get into your teeth and make them decay (腐烂).

    It is important to brush teeth every day. You should get a checkup from your dentist every year. Trying not to eat food that has a lot of sugar, such as candy and soft drinks, helps to protect teeth.

    The proper ways of brushing teeth

    Do you know that most people do not brush their teeth in the right way? Follow the methods below and they will help you keep your teeth healthy, clean and beautiful.

    ◆Replace your toothbrush every few months.

    ◆Clean two or three teeth at a time. Brush the front of your teeth with a circular motion (运动)and clean the backs of your teeth with up and down motions.

    ◆Use a gentle back and forth motion to clean the tops of your teeth where you bite (咬)into food.

    ◆Don't forget to gently brush the top of your tongue (舌头)from back to front. A lot of germs live there.

    ◆Take at least 2 minutes to brush your teeth.