Now many people like to keep dogs as their pets. But how did dogs become humans' close friends?

    In some places of Europe (欧洲), about 10,000 years ago, some wild (野生的) dogs often came to human's houses to find food. The wild dogs looked different from the ones today. They looked like wolves (狼). At first, they felt ① frightened. They always stood and looked for a short time. Then they got the food and ran away. Sometimes the young dogs couldn't run fast and people caught them. People trained them and the young dogs grew up with the help of people. Slowly, the wild dogs became home dogs. They could make home safe when people were away. They helped people hunt (狩猎). They helped people keep warm on cold nights. ② Sometimes, they could smell and hear danger before people could. In some cold places, they helped people pull (拉) things people need.

    Now there are more than 400 different kinds of dogs in the world. And they look different from each other. The number and kind are growing all the time. Today, some people mainly (主要地) regard dogs as pets. In fact, dogs are really our close friends. We should protect them from being killed.

    Different countries have different ideas about how to be polite. In Britain, table manners are important. But how do you show good table manners in Britain? Here is some advice:

    How to sit: You should sit up straight in your chair. When you eat, don't pick up the bowl. This is called very bad manners.

    Noises at the table: It is never a good idea to make a noise at the table. 

Using your fingers: Usually we don't pick food up with our fingers when we are eating main dishes. But there are some foods such as pizza, sandwiches, chips and fruit we can eat with fingers.

Passing things: If someone asks you to pass something like the salt, only get it if you are the closest person to it. Never lean (倾斜, 倾倒) across someone else's food. It's more polite not to use it yourself first — pass it directly to the person who asked, and then use it later. It's best to taste your food before you put salt in it.

    Your mouth: It is not polite to talk with your mouth full of food, nor to eat with your mouth open.

    How much to eat: It is polite to eat up the food that you have been offered, so a clear plate is a good plate. It shows that you enjoy the food. If you can't finish everything and you can leave a little, that is okay. You could say something like “That was very nice, thank you.”

    We've heard about several "poor students" in the past year. Cui Qingtao, a student from Yunnan, working with his parents on a building site when he got an admission letter(录取通知书) from Peking University. {#blank#}1{#/blank#} She is a student form Hebei. She was doing her part-time job in a different city when her family got her admission letter from Peking University.

    {#blank#}2{#/blank#} For example, they are all strong and optimistic (乐观的). Li Enhui said in an interview, "As long as we are alive, there are no problems that cannot be solved, and many people don't have my experiences. {#blank#}3{#/blank#}" Such an idea makes many adults feel embarrassed. He refused to accept donation money and decided to make money by himself. This is also the common thing that "poor students" have. Whatever kind of values you hold, such personalities(品格) are necessary for growth. {#blank#}4{#/blank#} Not everything goes well all the time. Only being strong and optimistic, can one go through difficulties. In fact, living in poor families doesn't promise such good personalities, and living in happiness doesn't promise optimistic attitudes(态度). We like such "poor students" because they are strong and optimistic.

    For them, few can choose their lifestyles. {#blank#}5{#/blank#} That's why they are highly praised. Every one of us should learn from them.