精彩导读
国产北斗卫星导航系统首次在中国国产ARJ21-700支线客机上成功进行测试，正式拉开了国产卫星导航系统在国产民用客机应用的序幕。
文章词数 2 9 6 建议用时 6′ 难度系数 ★★★
Many years ago， peoplerelied onthe sun，moon and stars to find their way around.Later，the compass 1.____（introduce）.And now， we have satellite navigation systems to guide us.A satnav system uses groups of satellites to show the user's location.They send information to a receiver，such as a smartphone，to show us 2._____we are.On Oct 14， an ARJ21-700 plane， which was the first home-made jet tobe equipped withthe BeiDou navigation system，3____._（success） completed a test flight.The results showed the performance of the system developed by China matches that of similar systems produced abroad.
Since 4_____._（it） introduction in 2000， the Bei-Dou navigation system has seen increasing numbers ofapplications linked toeveryday life，from shared bikes to farming.
When it comes5._____shared bikes，smart locks that support BeiDou chips offer more accurate positioning than others，making it6._______（easy）to find abike.
Farmers can use BeiDou-enabled tractors to plow the soil，and drones（无人机）7._____（use）BeiDou to sow seeds，8.______can improve efficiency and make better use of resources.BeiDou's farming applications have spread from Heilongjiang province to Beijing，Liaoning， Shanxi， Hubei and other regions across China.
With its many uses，the BeiDou navigation system is evenplayinga bigrole inthe Belt and Road Initiative.“To da te， the Beidous ystem has covered most parts of the Asia-Pacific region，as well as 9._____（country） along the Silk Road Economic Belt and the 21st Century Maritime Silk Road，” said Yang Changfeng，chief designer of the BeiDou system
Today，there are more than 20 BeiDou satellites above our heads，and China plans to launch up to eight more this year 10._____（expand） the BeiDou network to better serve the Belt and Road Initiative.
阅读扫障
1.application n.申请；应用
2.efficiency n.效率
3.rely on依赖；依靠
4.be equipped with装备；配备
5.be linked to...连接到……；和……有联系
6.play a role in起……作用；扮演……角色
读文刷题
阅读短文，在空白处填入1个适当的单词或括号内单词的正确形式。
语言提取
1.When it comes to shared bikes，smart locks that support BeiDou chips offer more accurate positioning than others，making it easier to find a bike.
翻译：________________________________________
【点石成金】When it comes to （doing）sth...“当提到……；当谈到……”，是固定句式；that引导的是限制性定语从句；making...是结果状语；it是形式宾语，代替后面的动词不定式短语。
句式仿写
（1）谈到练习乐器，我的练习时间是以前的两倍。
（2）大公司使生产便宜的牛奶变成了可能，这使送牛奶的人很难去竞争。
________________________________________.
2.Farmers can use BeiDou-enabled tractors to plow the soil，and drones using BeiDou to sow seeds，which can improve efficiency and make better use of resources.
翻译：________________________________________
【点石成金】本句说一个复合句。主句使用了use sth to do sth结构；which引导的是非限制性定语从句；make better use of“更好地利用”。
句式仿写
我们班提出了一个更好利用二手材料的想法。
