1.学生自学生词，并记住单词拼写和拼读。
2.预习课本，找出重点短语和句式。
3.读、记后完成学案中自学导练作业。
Step 1 完成教材Activities 1~7的任务
1.Complete the sentences and conversations with the correct form of the words and expression in brackets.（Activitiy 1）
(1)学生个体活动，完成填空。
(2)教师点名，个体汇报，全班核对答案。
2.Look at the pictures and describe the new classroom that will be built. Use the words in the box to help you. (Activity 2)
(1)学生个体活动，描述图片。
(2)两人一组交流,全班反馈。
3.Work in pairs. Ask and answer questions about these great inventions. (Activity 3)
学生分组讨论，相互交流,也可以进行适当扩展。
4.Complete the sentences with the words in the box. (Activity 4)
(1)个体活动，完成填空。
(2)两人一组核对答案，然后全班核对。
（答案：1.introduction 2.trade 3.spread 4.direction）
5.Listen and find out where the speaker is. (Activity 5)
(1)学生听录音，判断说话者所在的地点。
(2)教师点学生回答，并说出判断的根据。
6.Listen again and answer the questions.(Activity 6)
(1)学生浏览问题，听录音，记录有用信息。
(2)两人一组问答，互相补充。
(答案:1.Because they were written by hand.2.They are too valuable to be picked up and held in the hand.3.Old books were copied onto a computer a few years ago for people to be able to read them without touching them.)
7.Read the passage and choose the best title. Now complete the chart. (Activity 7)
学生个体活动，精读短文，寻找细节信息。完成图表,全班核对答案。
（答案：1960s—The Internet was invented for the army to use. 1970s—Scientists and businesspeople wanted to use the Internet to send and receive messages.
1991—The World Wide Web was invented. 1990s—More and more people started to use the Internet to send various types of files. Today—The Web has hundreds of millions of users. It has changed the way people live, work and play.）
