A

    Air pollution is one of the most common types of pollution in the world nowadays. It is quite serious in many places, especially in big cities. It can do great harm to our environment such as making the earth warmer, causing acid rain or destroying the ozone layer. As for human beings, air pollution causes all kinds of breathing problems.

    There are several reasons for air pollution. Firstly, many cities have a lot of factories and there we need to make food, clothing and other things. Every year these factories pour millions of tons of smog into air. Secondly, power factories can also give out harmful air. For example, in 1986 there was a bad accident at a nuclear power station in Russia. A cloud of radiation crossed the whole Europe. It is said that 125,000 people died in Russia as a result of illnesses caused by this accident. Thirdly, there are more cars in cities now. Once they are out in the streets, they will take in fresh air and give out dirty gas. Besides, smoking cigarettes also makes air pollution worse as will as damaging(损害) our health.  

    People already know a lot about animals. However, there are still some things about animals that may surprise you. Here are {#blank#}1{#/blank#}about animals you probably didn't know.

    Cows do have best friends and feel stressed when they are separated. Scientists have found that cows are very social animals and that a cow always {#blank#}2{#/blank#}other cows. When a cow is with its friends, it feels relaxed, compared with when it is alone.

    During a breeding season, a male penguin will offer a small stone to a female penguin as a gift. If she takes it, they will become partners. When the female penguin lays an egg, she and her partner may carry it {#blank#}3{#/blank#}, because some penguins don't build nests.

    Crocodiles (鳄鱼) swallow (吞) stones. Crocodiles always swallow their food instead of eating it like other animals. They swallow stones which break the food into very small pieces in their stomachs. These stones may stay in their stomachs {#blank#}4{#/blank#}.

    Elephants use plants to treat pain or other illnesses. Scientists once found a pregnant (怀孕的) elephant in Africa who ate a kind of plant which was not part of her normal food. Four days later, she {#blank#}5{#/blank#}a baby elephant. The same plant was used by the local pregnant women.

The Adventures of Tom Sawyer is one of the greatest works by Mark Twain. The book is so interesting. Even today, it is quite {#blank#}1{#/blank#}(受欢迎) among kids. Although I am already{#blank#}2{#/blank#}(四十), the book remains one of my favorites. I have learned an important lesson from Tom Sawyer after re-reading the book in {#blank#}3{#/blank#}(最近的) days.

In our daily lives, we are often given some boring or tiring {#blank#}4{#/blank#}(任务). What's in your mind when your mom tells you to clean the floor? Have you ever wanted to complain?

Tom Sawyer, however, thought " differently" when he was given a boring job. One{#blank#}5{#/blank#}(星期四) morning, Aunt Polly told Tom to {#blank#}6{#/blank#}(绘画) the fence(栅栏). The work was a punishment because he {#blank#}7{#/blank#}(错过) school one day. Tom's friend Ben Rogers happened to walk past. Instead of complaining, Tom told Ben that he felt "{#blank#}8{#/blank#}(激动的)" about the job. "Only one in a thousand—maybe even two thousand boys can do this!" Tom said.

Tom's words made Ben interested in the work. He even gave Tom his apple so that he could have a {#blank#}9{#/blank#}(机会) to do the work. If Tom had thought about nothing but complaining, he would have had a bad day doing the work.

This story teaches me a valuable lesson: Complaining is useless. The next time you are given a boring or tiring job, don't be disappointed. Unlike what {#blank#}10{#/blank#}(发生) in the story of Tom Sawyer, it is unlikely that someone will come and do the work for you. However, without complaining, you'll feel better and perhaps even do a better job!

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注意：文中不得透露个人真实信息；词数50左右；格式和开头已给出，不计入总词数。 

Dear Sir/Madam, 

My name is

……

Thank you very much! 

Li Mei is a student in my class.  She likes her daily life 1 school. 

Every morning, she gets up 2 at 6:00.  Then she goes to 3 in the park for thirty minutes.  Before 7:00 a. m. , she eats a delicious 4 .  After that she goes to school at 7:40 a. m.  Her school is not far, so she always 5 to school.  There are four 6 in the morning.  Among them, she likes Physics (物理) best, because she wants to be a scientist (科学家) when she grows up.  She eats lunch at 12:00 p. m.  She likes noodles for lunch.  Classes 7 at 4:00 p. m.  After school, she goes to the swimming pool to 8 there for an hour.  She goes home at 5:30 p. m.  Then she has dinner with 9 family.  She goes to bed at 10:00 p. m.  She thinks it is 10 for her to sleep early.