提示要点：1．水越来越脏；2．塑料袋(plastic bags)随处可见；3．树木被砍伐(cut down)。

要求：针对以上三个问题提出合理化建议。

    Nearly 7,000 medical workers in the team supporting Central China's Hubei province left the capital, Wuhan, the hardest-hit city in the novel coronavirus outbreak in China, and went back to their hometowns on Tuesday, March 31, marking the largest scale departure (离开) of medics (医学工作者)since the first group left on March 17. The Civil Aviation Administration of China has organized 51 planes to support the departure.

    More than 42,000 medics from other parts of the country have joined the battle with local medics to fight against COVID-19. The support teams came from 21 provinces, cities and autonomous regions(自治区) and some of them worked on several battlefields during the past months. The support team from the First Hospital of China Medical University in Shenyang, was among those in the group. Sixty members were in charge of treating COVID-19 patients in 100 beds in the Union Hospital and treated 174 patients who have been seriously ill since they arrived on Feb 10.

    Wang Zhenning, the leader of its support team, expressed his thanks to the Wuhan people who offered great help to them. "I am proud towitness and play a role in history. We've been here, seen it happen and become better. Wuhan is our second hometown. We will forever care about the city and the people fighting with us." he said.

    Wuhan city government showed great thanks to all medics in a letter, expressing their gratefulness of the medics' efforts to save lives in the battle. "Thanks to your arrival, Wuhan welcomes today's peace and stability. We will always remember your kindness!" the letter said. In it, the city government also invited the medics to visit Wuhan in the future for sightseeing. Local people volunteered to line up and see medics off as the medics left for home after finishing their mission(使命) in Wuhan. Wuhan traffic police led the way for medics to the airport.

Hello, I'm Selina. I'm very happy to tell you about my family. I have a good and big family. My mother's name is Catherine and she's 38. She works in a clothes shop. My father's name is Ted. He's 40. He works in an office. He's an office worker. I have a sister and a brother. My sister is Sarah and she is in Grade Nine. My brother Paul is seven. He is a very cute boy. 

There is a white dog in my family. His name is Simon and he is my good friend. We also have a brown cat. Her name is Loli. Brown is my sister's favorite color, so she loves Loli. 

This is us, the Smiths. I love my family!

Many of us don't spend a lot of time improving our writing skills. The following suggestions can be h{#blank#}1{#/blank#}. 

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Check facts. If we want people to believe what we write, we must make sure our facts are true and vivid. The facts will impress the readers. 

Polish. It is rewriting. Try to{#blank#}4{#/blank#}( 避 免 ) some mistakes. Although it takes more time and more work, rewriting makes our writing better. 

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It is not easy to become a better writer. Be{#blank#}9{#/blank#}(耐心)! Follow the writing skills above. 

We can write better articles as long as learn w{#blank#}10{#/blank#}, widely and well. 

I was in the classroom. This was 1 first lesson in junior high school. It was 2 . I used to feel bored in Chinese classes, so I hoped my new Chinese teacher would be 3 . 

Here came a woman teacher. She 4 " Li" on the blackboard. "This is my family name, " she 5 . "You can call me Ms Li. Now tell me what you want me to do in my lessons. " We were surprised. 6 could a student ask a teacher to do things? Everyone was in silence(沉默). 

Ms Li smiled and said, "Don't be 7 . Just tell me what you really want to say about our Chinese 8 . I will try my best to meet all the needs of 9 . " Hearing what she said, we were excited and started to say our needs 10 worries. "Not too much 11 ";"Finish class on time";"Make the class fun". We talked a lot and Ms Li didn't stop us. 

When we finished, Ms Li said, "First, you will not have much homework, but you should 12 it on time. Second, my classes will be fun, 13 you can't play too much. Third, I will finish class on time. But you must 14 me carefully(认真地) in class. All right?""OK!" all of us answered happily. 

I think Chinese is very useful in our life, so it is really 15 to learn Chinese well. I'm sure our Chinese classes will have a lot of fun because of this interesting teacher. I may never get bored with Chinese classes.