2.　　 Ask students to work in pairs.

1.　　 Present a conversation.

3.　　 Check the answers.

Step5 1c

2.　　 Play the recording.

1.　　 Ask students to read the dates.

3.　　 Ask several groups of students to present their conversations to the class.

Step4 1b

2.　　 Ask students to check their answers by groupwork.

1.　　 Ask students to number the inventions 1-5.

2．回答问题。

　　(1)When was the car invented?____________________________________

　　(2)What are the car used for? ____________________________________

　　(3)What is the telephone used for? ____________________________________

　　(4)What is heated ice cream scoop used for? ____________________________________

　　(5)Who was papermaking invented by? ____________________________________

1．根据时间和人物写出发明物。

　(1)1885_____________

　(2)1876_____________

　(3)1927_____________

　(4)1976_____________

　(5)Julie Thompson _____________

　(6)Chelsea Lanmon _____________