（一）
假定你是紅星中學初三學生李華。你的美國朋友Jim在給你的郵件中提到他對中國新近出現的一種共享單車「mobike」很感興趣，並請你做個簡要介紹。請你給Jim回信，內容包括：
1. 這種單車的使用方法（如：APP查看車輛、掃碼開鎖等）；
2. 這種單車的優勢；
3. 你對這種單車的看法。
注意：
1. 詞數不少於80；
2. 開頭和結尾已給出，不計入總詞數。
提示詞：智慧型手機 smartphone, 二維碼 the QR code
參考範文
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 mobikethrough 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單車(shared bikes)，比如摩拜單車(Mobike)、Ofo共享單車等。由於它們方便停放，騎車也能起到鍛鍊身體的作用，作為代步工具很受大家歡迎。但是，各地也出現了很多毀車現象，比如刮掉車上的二維碼(QR code)、上私鎖等。
你對這種現象怎麼看？你對共享單車公司有什麼建議嗎？寫一篇符合邏輯的英語短文，80詞左右。
參考詞彙：bike-sharing companies 共享單車公司，Mobike 和Ofo 是兩家共享單車公司，convenience 方便，register登記
參考範文
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）
共享單車（bicycle sharing）已成為時下最熱的話題之一，請你就這一話題寫一篇短文。內容須包括三方面：1. 共享單車蓬勃發展，成為社會熱潮；2. 共享單車帶來便利，但也存在問題；3. 我對解決問題的建議。
參考範文
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 cansave 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 is obviously helpful to human beings as a high-tech product. The government should introduce relevant provisions toregulate this market to avoid its disadvantages.
高階範文（較難）
My Views on Bicycle-sharing
Presently, in big cities like Shanghai and Guangzhou, bicycle-sharing system has becomeincreasingly 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 effectiveand efficient measures taken, and efforts made by those involved, it can be expected that bicycle-sharing system will play a contributive and constructive role in urban public transportation.