Text A　Why Are Maps Drawn with North at the Top?

　　搭配:

　　1. Little more than  仅仅是

　　2. Place sth. on a sound footing  把什么建立在可靠的基础上

　　3. Be known to sb./sth.  为某人或某事所知

　　4. Base on  建立在什么基础之上

　　5. Rather than  而不是

　　6. Attempt to  试图做某事

　　7. In the form of  以某种形式

　　8. Be unaware that+从句  没有意识到

　　9. The reason for sth.  什么的原因

　　10. Interfere with  干涉

　　11. In accordance with  根据

　　12. With the spread of sth.  随着什么的扩展

　　13. Increasing reliance on sb./sth.  越来越依赖

　　语言点:

　　1. It was not until many centuries later that the ancient Greeks placed the science of map-making on a sound footing. 这是一个典型的强调句型,not until many centuries later是被强调的成分.

　　2. Flattened  平面的

　　3. Given（考虑到） the state of knowledge of those times, he got things wrong.

　　4. His estimate of China and the Atlantic Ocean was far from being accurate.（动名词作介词宾语,表示一点不准确）

　　5. Move（v.移动）-immovable（adj.固定不变的）；use（v.使用）-useless（adj.无用的）

　　6. Assume  假定

　　Text B　You Have a Choice

　　搭配:

　　1. Travel side by side  并列行驶

　　2. Be certain of  对什么很确定

　　3. Bring about  引起

　　4. Account for  解释

　　5. Lead to the same result  导致同一结果

　　6. Choose one over another  选择一个而不选择另一个

　　7. Deal with  处理；解决

　　语言点:

　　1. We are seated in one of the trains, and with us we have a special speedometer that measures their relative speed.

　　2. Furthermore,regardless of which explanation we choose,the end result will be the same.

　　3. Motion（n.行动）-motionless（静止的）

　　4. At the train station we cannot tell whether it was our train or not.

　　5. Only after the other train pulled out of the station could we see that it,and not our train,was moving.本句话为倒装句,由only+状语从句构成+助动词+主语+动词的适当形式+其他