18.A　根据空后的“this is not enough to solve our problem”可知,空前后为转折关系。

　　19.D　根据空前的“Maybe there is another way out.”可知,我们需要修理我们的物品,而不是扔掉它们。

　　20.A　根据下文可知,我们也要再次考虑我们的消费态度。

　　二、七选五阅读填空(共5小题;每小题2分,满分10分)

　　Learn to think

　　“I will think of it.” It is easy to say this.　1　 We can not see our thoughts,or hear,or taste,or feel them;and yet what mighty power they have! 

　　Sir Isaac Newton was seated in his garden on a summer’s evening,when he saw an apple fall from a tree.　2　 Later,he discovered how the earth,sun,moon,and stars were kept in their places. 

　　3　 He began to think;he wanted to find out why the steam in the kettle moved the heavy lid.From that time he went on thinking and thinking.When he became a man,he improved the steam engine so much that it could,with the greatest ease,do the work of many horses.　4　  

　　A man named Galileo was once standing in the cathedral of Pisa,when he saw a chandelier swaying to and fro.This set him thinking,and it led to the invention of the pendulum.

　　Boys,when you have a difficult lesson to learn,don’t feel discouraged,and help yourselves before asking someone to help you.　5　  

【2017届高考英语一轮复习知识梳理练习：必修2 Unit 4 Cyberspace（北师大版）】相关文章：

★ 2017届高考英语二轮复习大题冲关秘籍完形填空之记叙文：命题趋势（含解析）

★ 2017届高考英语二轮复习课时训练：3（含解析）

★ 【北京专用】2014届高考英语一轮复习方案课时作业：选修8 Unit 4 Pygmalion

★ （安徽专用）2014届高考英语一轮复习方案 作业手册（16）模块6 《Unit 16 Stories》（含解析） 北师大版必修1

★ 2015-2016高考英语一轮复习的四点建议

★ 2014届高考英语一轮复习课时作业(二十七)必修5Module 3《Adventure in Literature and the Cinema》（外研版）

★ （安徽专用）2014届高考英语一轮复习方案 作业手册（2）模块1 《Unit 2 Heroes》（含解析） 北师大版必修1

★ 【三维设计】2017版（江苏专用）二轮复习练习：必修3 Unit 3《Back to the past》课时跟踪检测A卷（含解析）

★ 【三维设计】2017版（江苏专用）二轮复习练习：必修3 Unit 2《Language》课时跟踪检测B卷（含解析）

★ 四川省2016届高考英语一轮复习课时作业（36） Module 6 War and Peacel 外研版选修6