4 . When having a meal, a European usually holds the knife in the right hand, and the fork in the left. He uses the knife and fork with his both hands. He keeps his knife and fork in his hands until he finishes eating.

But an American, on the opposite, may use just one hand whenever possible and keep the other hand on his lap. He uses the fork in his right hand to pick up fried potatoes. When he has to cut his meat, he changes his fork to the left hand and cuts it. Then he puts down the knife and changes his fork to his right hand to pick up the sliced meat. Then, perhaps, he will suddenly think of his coffee or orange. So he has to put down his fork in order to drink his coffee or orange. Now you can see, an American is busy all the time at the dinner table. By the way, Europeans usually have their coffee after meals, but many Americans prefer to have coffee during the meal.

If you are present at a formal dinner, you might be confused to find so many forks, knives and spoons put before you. You might be at a loss to know what to do with them. Don’t worry. The rule is simple. You just use them in the order in which they lie, beginning from outside towards the plate. The small fork on the outside on the left is for salad. The spoon on the outside on the right is for soup. There is another little knife, called a butter spreader, on a bread-and-butter plate on the left. As the bread is passed, each guest helps himself and puts his pieces on the small plate. Next to the soup there will probably be the blunt(钝的) knife for fish, which is smaller and blunter than other knives.

5 . Wind power is a very clean source of energy. This is how wind power works. Wind makes windmills spin(旋转). When the windmills spin, they make electricity. Then we can use the electricity.

A lot of people think that wind power is new, but that’s not true. For thousands of years, people have used wind to sail boats and move water. We still do those things today, but these days we mostly use wind power to make electricity.

Wind power is a very popular source of energy. Most people think that we should use it more and more. First of all, it’s clean. Windmills don’t pollute the environment at all. Second, we can use wind power forever. After all, we will always have wind. Also, wind power is cheap, and it’s getting even cheaper.

A lot of people don’t understand wind power very well. They believe that there are problems with wind power, but many of those problems are not real. For example, some people say that windmills are dangerous for birds. They used to be true, but it isn’t true anymore. Old windmills killed birds because they spun very fast. New windmills spin slowly, and they aren’t dangerous for birds.

However, there are real problems with windmills. One problem is that many people think windmills are very ugly. This is a problem for people, because windmills are often in very pretty areas. Also, wind doesn’t blow all the time, so we can’t use wind power all the time. Finally, windmills are noisy.

Wind power is becoming more and more common. Right now, more than 80 countries use wind power. About 2.5 percent of the world’s power comes from the wind. For some countries, that number is a lot higher. Wind power gives Denmark more than 25 percent of its electricity.

7 . We asked high school counselors(指导教师) for their best advice on what high school seniors should do over the summer to ensure a successful freshman year on campus. Let’s see what experts say.

Elizabeth Hammer, chair of guidance at General Douglas MacArthur High School

Many students find their roommates through school-specific social media groups instead of being randomly assigned by their college, so join the school’s freshman class Facebook group and find yourself some like-minded roommates.

Antoinette Shervington, school counselor at Brentwood High school

Colleges may have offered another student a scholarship, but that student has decided not to attend, freeing up that money. “Reintroduce” yourself to the admissions or the financial aid office and ask if any scholarships have reopened.

Martha Tuthill, guidance counselor at Shelter Island School

Many colleges automatically include health insurance as part of the cost, but if you have insurance you can have that waived (免除). Companies also offer optional tuition( 学费) insurance, which protects a percentage of a term’s tuition cost if a student has to drop out for a medical reason.

Jillian Tammany, guidance counselor at West Hempstead High School

Students should know where the health office is, and who to turn to if they are feeling anxious after failing an exam, feeling at a loss what future career they should choose or angry about untidy roommates.

8 . All over the world the need for more laptops and computers increases each year. Networks have been part of our life. Probably everyone with a portable device(移动设备）has once logged on to a public WiFi network without paying for it while they are having a coffee, on a train, in a shopping mall or at a hotel. However, is this kind of public WiFi network safe?

Some networks are better protected than others because encryption(加密) methods are used. Therefore, they are safer than others. But a survey in 2015 showed that more than 950 million records were not protected, including addresses, emails, birth dates, phone numbers, passwords and so on. These open WiFi networks are really not safe, because it is very easy for hackers(黑客)to break into the operating system and get people's private information.

Most smartphones and laptops, by themselves, search and connect to WiFi networks. They usually prefer a network with a connection that has been used before. Hackers' devices are able to record these searches and look like the trusted WiFi networks. When these smartphones and laptops log on to the networks which are not real, hackers can easily steal their private information.

So next time, when we want to use our laptops or our smartphones in public places which offer free WiFi networks, please think twice or take safe measures before using them.

10 . As a teenager, I am often asked what I am going to be in the future. A lawyer? A doctor? Or a scientist? No, my ideal career is to be a teacher. One of the _________for that is I want to be a teacher like Mr. Chen.

“Look! Do you know what it is? A-ha, it’s the _________! And it will always move around the sun.” Mr. Chen said and pointed to his head. He then touched the nose and _________, “Can you tell me the name of this mountain? It is the highest mountain on Earth! What’s the _________of it? Yes, it’s 8844.43 metres…” I’ll never forget my first geography lesson. He was _________ humorous that we all fell in love with his lessons   _________. It’s Mr. Chen who opened the door of geography for us.

Generally speaking, most of the teachers are strict _________students and sometimes a little bit demanding (苛求的), not so with Mr. Chen. He is a lighthouse, showing us the way to the treasure of knowledge. He is a friend and easy to get _________with, always encouraging us to speak out loud without _________our shyness and other disadvantages. He is an example, volunteering his time to students and other teachers.

One day I happened to meet him in the hospital. Seeing the cut on his arm, I realized he was donating his __________. I was moved and was __________another lesson, a lesson of love and devotion.

Every time I see my globe (地球仪), it would __________me of Mr. Chen. He is the most unforgettable teacher I have __________met and he will always be. Someday I hope I am __________ to be a teacher like him.

Thank you, Mr Chen, thank you for making learning not a job but a joy.

Thank you for helping me to discover what I do best and to do it even __________.

Thank you for understanding all of us and giving us the time and care each of us needs.