题目内容：

Fill in the blanks with the first letter given from the context.

Since last year, city streets around China have seen colorful shared bikes, which people can r1. with a smartphone app and park wherever they choose. To r2. traffic jams and air pollution, many cities have offered bike-sharing, but sometimes dreams can turn sour.

As shared bikes become more popular, problems keep showing up. According to news reports, shared bikes are b3. treated（对待）by users. When people are using the bike, some of them just throw it onto streets and even into ditches. Recently, a man in Shanghai was f4. 1,000 yuan for stealing a shared bike.

At the same time, the d5. to the QR codes on bikes has brought huge losses to bike-sharing companies, like Mobikes. If the QR-code is damaged, the bike cannot be used any more. It can cost several hundred yuan for the company workers to find a lost bike and get it r6..

Mobike has credit(信用) scores for each u7.. Punishment(处罚) will be taken in case of users' bad behavior. Bike rental will go up to five yuan per minute if the score f8. to below 80.

However, punishment may not be the b9. way to stop shared bikes from being stolen or damaged. Bike-sharing services will work well only if people follow the rules and show r10. for the bikes and others.