11. What relation is the woman to the boy?

A. His mother. B. His teacher. C. His new friend.

听第10段材料，回答第17-20题。

12. What's the speaker's purpose of this talk?

A. To explain how to write the paper.

B. To tell how the course is organized.

C. To talk about some political thinkers.

13. How long will the course last?

A. Eight weeks. B. Twelve weeks. C. Eighteen weeks.

14. What will the students do on Wednesday?

A. Hand in a paper. B. Rewrite a paper. C. Give a presentation.

15. When will the speaker come to discuss papers?

A. On Monday.

B. Over the weekend.

C. On Thursday and Friday afternoon.

II. 阅读理解 （每小题2分，共15小题，30分）

　　A

　　Most people have map apps on their phones that can show their location and guide them to where they want to go. But how do these apps know your location at any time or place? They find you by using satellite navigation (satnav) systems (卫星导航系统).

　　A satnav system uses groups of satellites to find the user's location. This location information is then sent to a receiver, such as a smartphone.

　　The first satnav system was the Global Positioning System (GPS), which belongs to the United States. First used in 1964, the system is the world's leading satnav system. But China's satnav system, Beidou, has overtaken (超过) GPS in size, Japan's Nikkei Asian Review reported.

China sent Beidou's first navigation satellite into space in 2000. China also became the third country to build a satnav system after the US and Russia, People's Daily reported. As of right now, over 30 countries in Africa and the Middle East are using the