内容正文：
Unit 3 The world online
Integrated skills
1. Do you often use the Internet? How about your parents?
2. In which way do you usually access the Internet, using a mobile device or other devices?
Yes. I often use the Internet, and so do my parents.
I usually access the Internet by using a mobile device, such as a smartphone and tablet.
Lead-in
3. What do you often do on the Internet?
I often play online games，send emails, text instant messages, search for information, download learning resources, do online shopping and make online payments.
Listening skills
1. Read before you listen. 听前预读
2. Catch the key words. 抓关键词
3. Take notes quickly. 快速笔记
4. Be in a good mood. 心态良好
Pre-listening
Mr Tan, an IT teacher, is giving a brief introduction to the Internet. Listen and finish the exercises below.
A
A1 Listen to the talk and answer the following questions.
Listening
1. What does Mr Tan mainly talk about in his introduction to
the Internet?
2. How many computers were connected in the beginning?
Four computers.
The history and development of the Internet.
3. What did scientists around the world originally use the
Internet as?
4. What did Tim Berners-Lee teach others to do?
A space to share information.
To build their own websites.
1. Read the following numbers referring to years.
1865, 1998, 1900, 1800, 1809, 2000, 2008, 531 BC, mid-2008, the early 1980s, the late 1990s, 2021, ...
Reading the numbers
2. Explains ways of saying years.
Ways of saying years
1865 (eighteen sixty-five)
1998 (nineteen ninety-eight)
1900 (nineteen hundred) 1800 (eighteen hundred)
1809 (eighteen o nine)
2000 (two thousand)
2008 (two thousand and eight or twenty o eight)
531 BC (five three one BC or five hundred and thirty-one BC)
A2 Listen to the talk again and complete the timeline below.
In (1)____________ The first general-purpose computers
came onto the market.
In 1969 Computers allowed people to
(2)_______________ along a network.
In (3)____________ Pub