（一）
假定你是红星中学初三学生李华。你的美国朋友Jim在给你的邮件中提到他对中国新近出现的一种共享单车“mobike”很感兴趣，并请你做个简要介绍。请你给Jim回信，内容包括：
1. 这种单车的使用方法（如：APP查看车辆、扫码开锁等）；
2. 这种单车的优势；
3. 你对这种单车的看法。
注意：1. 词数不少于80；
2. 开头和结尾已给出，不计入总词数。
提示词：智能手机 smartphone, 二维码 the QR code
参考范文
Dear Jim,
I’m writing to tell you more about the new form of sharing bike mobike mentioned in your latest letter.
It’s very convenient to use if you have a smartphone. What you do is find a nearest mobike through the APP, scan the QR code on the bike, and enjoy your trip.
Compared to other forms of sharing bike, the greatest advantage of mobike is that you can easily find one and never worry about where to park it. It is becoming a new trend as a means of transportation, which relieves the traffic pressure and does good to the environment as well.
Hope to ride a mobike with you in China.
Yours,
Li Hua
（二）
最近很多大城市都投放了共享单车(shared bikes)，比如摩拜单车(Mobike)、Ofo共享单车等。由于它们方便停放，骑车也能起到锻炼身体的作用，作为代步工具很受大家欢迎。但是，各地也出现了很多毁车现象，比如刮掉车上的二维码(QR code)、上私锁等。
你对这种现象怎么看？你对共享单车公司有什么建议吗？写一篇符合逻辑的英语短文，80词左右。
参考词汇：bike-sharing companies 共享单车公司，Mobike 和Ofo 是两家共享单车公司，convenience 方便，register登记
参考范文
The shared bikes like Mobike and Ofo bring great convenience to people. You needn’t lock them by simply using your smart phone. They can take you where the subway and bus don’t go. And they can be left anywhere in public for the next user.
However, bad things happen. Some people damage the QR code on the bike, or use their own lock, which causes trouble to other users.
In my opinion, it’s difficult to turn these people’s ideas in a short time. Therefore, bike-sharing companies like Mobike and Ofo need to do something. For example, those who damage the bike should pay for their actions. Also, because people use their real name to register as a user, it’s a good way to connect to one’s personal credit.
In the end, what I want to say is to take good care of public services.
（三）
共享单车（bicycle sharing）已成为时下最热的话题之一，请你就这一话题写一篇短文。内容须包括三方面：1. 共享单车蓬勃发展，成为社会热潮；2. 共享单车带来便利，但也存在问题；3. 我对解决问题的建议。
参考范文
Bicycle Sharing
With the development of technology, bicycle sharing comes into people's lives. It becomes more and more popular and much news reported it. At the same time, we should see that there are some problems caused by bicycle sharing.
On one side, bicycle sharing makes it very convenient of people traveling. You can find a bicycle anywhere at any time when you want to go out for a cycling, and the price of one trip is very low. It can save time for people. On the other side, its management is not perfect. Even kids can open the lock and ride the bicycle, there is no doubt that such behavior is very dangerous. What's more, many people deliberately break it, like throw it to the river or destroy the code above it.
In my opinion, we should take a developing view about bicycle sharing. It isobviously helpful to human beings as a high-tech product. The government should introduce relevant provisions to regulate this market to avoid its disadvantages.
高阶范文（较难）
My Views on Bicycle-sharing
Presently, in big cities like Shanghai and Guangzhou, bicycle-sharing system has become increasingly popular. A large number of shared bikes can be found and rented at a low price. Moreover, you can park the bike almost anywhere you like.Urban transportation has thus been made much more convenient and even revolutionized.
However, along with its rapid development, bicycle-sharing system also brings some problems, including random parking, vandalism and possession of shared bikes, etc.
To solve these problems, there are some measures for the authorities to take.Firstly, the government could implement more strict laws and rules to regulate the operation and management of bicycle-sharing system. Secondly, the public should raise their awareness of using shared bike reasonably. Lastly, urban transportation system should be upgraded and improved to accommodate automobiles, bikes and pedestrians.
To conclude, a sensible attitude should be held toward bicycle-sharing program. With effective and efficient measures taken, and efforts made by those involved, it can be expected that bicycle-sharing system will play a contributive andconstructive role in urban public transportation.
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