Do you know what makes lightning (闪电)? {#blank#}1{#/blank#}

    Lightning strikes happen when ice and water in clouds rub (摩擦) together, and cause atmospheric (大气层的) changes. When this happens, it creates a static charge (静电). Lightning can strike inside the cloud, between two clouds or between a cloud and the earth. {#blank#}2{#/blank#}

    Lightning can be very dangerous. Every year, lightning kills people because it can start big fires or because it reaches a temperature of 28,000℃. About 1,000 people are hit by lightning every year in the United States, and about 100 of them die as a result.

    {#blank#}3{#/blank#}Scientists think that there are more than three million lightning strikes every day in the world. An American man, Roy Sullivan, who worked in a park, survived from the most lightning strikes. {#blank#}4{#/blank#}And he keeps the highest world record.

    Lightning is sure not something to play with. When lightning strikes, it's best to stay inside a large building. {#blank#}5{#/blank#}Also, do not lie down on the ground, or the electricity may go through you and cause a heart problem.

    English playwright Arthur Wing Pinero said, "Where there's tea, there's hope." Similarly, a Chinese saying goes that "Firewood, rice, cooking oil, salt, sauce, vinegar and tea are the seven necessities to begin a day."

    Tea is, without doubt, welcomed all over the world. According to Statista, a German website for statistics (数据), global tea production reached about 5.8 million tons in 2018. It has become the most consumed beverage (饮品) in the world – after water, of course.

    According to the UN, tea is much more than just a hot drink. It's a big part of many cultures around the world. You probably know that people in China use top-grade tea to show respect when receiving important guests. Meanwhile, the British tradition of afternoon tea is an important part of that country's identity. Making Malaysia's pulled tea has become a sort of art form, where drinkers take pride in its entertainment aspects.

    Apart from its cultural significance (意义), tea is also a medicine, used from ancient times to modern day. "Tea is cold and lowers the fire," Chinese Ming Dynasty herbalist Li Shizhen once said. The health benefits of tea are still being discovered today: preventing heart disease, obesity and cancer have all been linked to drinking green tea, according to the National Center for Biotechnology Information in the US.

    Hot or cold, bagged or loose-leaf, tea is more than a drink – it's a social custom and also a magic medicine, a link to the past and a way of life.

Have you ever wondered what an American high school is really like? This article will describe a typical (典型的) high school and its students.

A typical American high school has several large buildings and enough space for about 1,500 students. Every student is given a locker. When students first arrive at school, they go straight to their lockers to put away or get their textbooks and to hang up their outdoor clothes. As American textbooks are expensive, students would rather loan (租借) than buy them. Students must pay back if they lost any of them.

American students have different types of school transport. They usually take a yellow school bus or walk to school if they live close enough. Sometimes their parents drive them to school.

When they turn 16 years of age, most take a free driving class at school for one term. If students' exam passing grades in the class and also pass their state driver's exam, they can begin driving themselves to school.

Each day, students take six or seven classes. They must take science, math, English and social studies. They can choose art, homemaking, fashion design and other classes. In some schools students are required to take one or more of the following special classes: health education, physical education or foreign language studies. Students move to different classrooms for each subject. This is because cache teacher has their own classroom. There is a five-minute break between classes, to give the students the time to hurry to their next class.

The regular school day usually ends early in the afternoon. After school more than half of the students take part in after-school activities. These activities include sports, specially football, basketball, baseball and soccer or clubs, such as yearbook, speech, school newspaper, photograph or student government.

Title: {#blank#}1{#/blank#} in an American High School

Giraffes are the tallest animals on the Earth. Male giraffes can grow to a h{#blank#}1{#/blank#}of about 17 feet. An adult giraffe can look into your bedroom window on the second floor.

Giraffes only live on the continent of Africa. The only giraffes in China are f{#blank#}2{#/blank#}in zoos or animal parks. V{#blank#}3{#/blank#}love to see the giraffes because they are so tall.

Giraffes love to eat leaves. With their longest necks, they can e{#blank#}4{#/blank#}eat leaves from the tops of trees. Giraffes don't d {#blank#}5{#/blank#}much water. They get much of the water they need from the leaves they eat.

Li Hua and Wang Tao are two students of Class 4, Grade 7. They both like sports. Li Hua is a basketball fan. His favorite sport is playing basketball. Yao Ming is his favorite basketball player. He wants to be a basketball player like Yao Ming when he grows up. Li Hua is on the school basketball team now. Every Friday afternoon, Li Hua plays basketball with his classmates after class.

Li Hua's friend Wang Tao isn't good at basketball, but he is very good at soccer. Ronaldo is his favorite soccer player. Wang Tao is on the soccer team. He plays soccer with his teammates (队友) every Tuesday afternoon.