三、语法填空。
In China, when you want to travel on a high-speed train, you can now choose a quiet car. The big train company in China has started this on some train lines, including the ones 15. Beijing to Shanghai, Beijing to Guangzhou, and Chengdu to Chongqing.
You can choose a quiet car 16. you buy your train ticket on the website www.12306.cn,which can offer train tickets. You can ask for a quiet seat in the 17. (two) class (等级). On the 12306 phone app, if a train has a quiet car, you 18. (find) a "quiet" sign.
After you buy your ticket, you will receive 19. message telling you not to make any noise in the quiet car. You should use headphones when 20. (listen) to music and go outside the quiet car if you talk on the phone. Parents must make sure their 21. (child) behave well so that they won't cause any trouble for others. The conductors (列车员) will speak more 22. (soft). They also know when each person will get off the train and can tell 23. (they) quietly.
If you would like 24. (buy) some food, you can scan (扫描) a special code on the arm of your seat. Follow the steps to order, and the salesperson will bring it to you.
Now, you can enjoy a nice and quiet train trip!

四、任务型阅读。
What are magic words? Words like "thank you" "please" and "sorry" can work wonders in our daily life. These polite expressions are used every day in America—among strangers, between friends or with family. What should you do when you receive a gift for your birthday? You had better sit down and write a letter of thanks. The words "thank you" are very important and used very often. We use them when someone hands us a letter, passes a book, offers us a drink, or lends us an umbrella.
"Please" is another important word, but many people forget to use it. It is not polite to ask someone for help without saying "please". We are supposed to use it when we ask for something, too. It may be a book, a pen, or milk. It may be in the classroom, at home, or at the bus stop. We can use "please" to make a request politely.
We should learn to say "sorry", too. If we have hurt someone's feelings, we will have to say "sorry". When we have told a lie and regret it, the same word should be used. Sometimes we have forgotten something or broken a promise, so we need to explain with the word as a beginning. "Sorry" is such a word that can make people forget the wrongs of the past.
"Thank you!" "Please!" "Sorry!"—the words are simple but useful. We use them now. So will our kids.
25. What are the magic words mentioned in the text?

26. What should we do when we receive a gift for our birthday?

27. How can the word "sorry" help us?

28. What do you think of these magic words? ()

29. 将短文中画线句子翻译成中文。