Hello, everyone!  1 to Class 3. I'm your new English teacher, Mr. Yang. Now let me tell you our class  2. First, you can't be late 3 class. You must 4 on time. Second, you must bring your English books and notebooks to every 5. Third, you must   6 English during the pair work activities. If it's 7 for you, you can ask me for help. Fourth, if you have any  8, you must put up your hands(举手). You can't talk or stand up without permission（未经许可）. These are all the rules. They are good for you,  9 you must follow them. I hope we can have a good 10 every day.

    As we know, there are differences between Western culture and Chinese culture. {#blank#}1{#/blank#}. Let's look at some words about animals and plants. Most expressions in Chinese about the dog, for example, "a homeless dog", "a mad dog", "a running dog" and "a dog catching a mouse", have bad meanings. {#blank#}2{#/blank#}. In English, people use the dog to describe good actions. For example, "you are a lucky dog" means you are a lucky person. And "every dog has its day" means each person has good luck sometimes. To describe a person's serious illness, they say "sick as a dog". The word "dog­tired" means very tired.{#blank#}3{#/blank#}. But in Western culture, "cat" is often used to describe a woman who is unkind. There are many other examples of how "cat" is used differently as well.

   {#blank#}4{#/blank#}. People think the rose stands for love, peace, courage and friendship. And the rose is the national flower of England, America and many other countries.

    {#blank#}5{#/blank#}. We can learn about many differences in cultures by comparing how some words are used.

A. However, Chinese love cats very much

B. The words about plants and animals are used in good or bad ways in different cultures

C. We can see differences when we pay attention to the way words are used

D. However, westerners love cats very much

E. We can see similarities when we pay attention to the way words are used

F. The rose is regarded as a symbol of love in both China and some Western countries

G. But in Western countries, dogs are considered to be honest and good friends of humans

    Schools in the UK are quite different from those in China. In the UK, at the beginning of the term, students must select their courses and teachers first.

    {#blank#}1{#/blank#} So in the first term, don't select too many courses, or you'll feel nervous and it may influence your study. Then you have to ask for some teaching plans. There is some information about subjects, time arranging, marks and textbooks. {#blank#}2{#/blank#} Different teachers have different teaching methods.

    If the teacher is called "killer" by the last grade, many students will give up choosing him, because this kind of teacher will leave too much homework, give too many exams and too low grades.

    {#blank#}3{#/blank#} How to buy textbooks makes each student feel hard. The textbooks in the UK are very expensive. Each copy is about $30 -50. In order to save money, many students buy some used textbooks. {#blank#}4{#/blank#}

    In class, discussing is very important. The teachers always encourage you to ask questions or show your own opinions freely. They don't usually ask you to sit well. {#blank#}5{#/blank#} They usually don't give you much homework to do. So in the schools in the UK you can learn knowledge and do exercises by yourself. You must do almost all things independently.

A. And some students usually borrow textbooks from the school library.

B. At the same time, you must select the teachers.

C. Selecting is very important for your grades in the UK.

D. Instead, they allow you to sit or stand everywhere you like.

E. There is another thing after you select the courses and the teachers.

Astronauts would face dangers both getting to and surviving (生存) on Mars. Let's learn about surviving a trip to Mars.

What would it take to keep people safe and healthy on a trip to Mars? Scientists are already working on it, though the trip may be many years later.

Over the last 60 years, many spaceships have flown by orbited（沿轨道运行）and even landed on the Red Planet. However, machines cannot replace humans. That's why the United States, China and other countries want to send people to Mars. But surviving on this trip would not be easy.

A trip to Mars would be the farthest journey in human(人类) history. Mars is about 225 million kilometers away, so it would take astronauts at least 180 days to reach there. However, it only takes a few days to get to the Moon.

Space travel is dangerous. For one thing, staying in space for long periods makes the human body weak. Also, it puts pressure behind the eyes and causes eye problems. But gravity(重力) machines could help.

Then there's space radiation(辐射) to worry about. It is bad for astronauts when they have long journeys. Scientists are working out the issue. They have found that taking certain vitamins can help.

Astronauts will have to pack light to lift off from the earth. But they won't be able to get the things they need easily. Astronauts on the space station practice for this by growing lettuce and other food in space. Engineers are developing 3D printing techniques（技术）which can allow future Mars astronauts to build what they want.

Did you find or lose anything? Here are some lost and found notices.