根据下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式，并将答案填写在相应位置。
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, （1） the ones from Beijing to Shanghai, Beijing to Guangzhou, and Chengdu to Chongqing.
You can choose a quiet car when you buy your train ticket on the website 12306.cn （2） can offer train tickets. You can ask for a quiet seat in the （3） （two）class（等级）. On the 12306 phone app, if a train has a quiet car, you （4） （find）a “quiet” sign.
After you buy your ticket, you will receive （5） message telling you not to make any noise in the quiet car. You should use headphones when （6） （listen）to music and go outside the quiet car if you talk on the phone. Parents must make sure their （7） （child）behave well so that they won’t cause any trouble for others. The conductors（列车员）will speak more （8） （soft）. They also know when each person will get off the train and can tell （9） （they） quietly.
If you would like （10） （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!