英语教材讲解 九年级 上PDF电子书下载

Unit 1 The Developing World 1

Topic 1 Our country has developed rapidly 1

Topic 2 What a large population! 22

Topic 3 The world has changed for the better 44

Unit 2 Loving Our Planet 68

Topic 1 Pollution causes too many problems 68

Topic 2 All these problems are very serious 90

Topic 3 Would you like to be a greener person? 110

Units 1-2综合测试 131

Unit 3 English Around the World 140

Topic 1 English is widely used throughout the world 140

Topic 2 English is spoken differently in different countries 160

Topic 3 Could you give us some advice on how to learn English well? 180

Unit 4 Amazing Science 202

Topic 1 Spaceships are mainly controlled by computers 202

Topic 2 When was it developed? 221

Topic 3 We will live in space one day 244

Units 3-4综合测试 265

参考答案 275