later each group will speak out their opinions. After this, show the suggested answers on the PowerPoint.

T: OK. Let's read the text again. Please look at the structure of the text. You are given 5 minutes.

...

T: Please stop here. I'm glad you thought actively and had a heated discussion. What is its writing style?

Ss: This text is an expository writing.

T: What is the topic of the text? What is the text about?

S1: Global warming.

S2: The text introduces what global warming is.

S3: Its causes and consequences.

S4: And how we can help solve the problem of global warming.

T: Quite good. How many parts consist of the article? What's the main idea of each part?

S4: In my opinion the article is made up of four parts. In the first paragraph the author raises the question. In the second paragraph we can find its definition. And the third and fourth paragraphs tell us its causes and consequences. And the last part the author gives us some tips on how to solve the problem.

T: Well done!

If students have different opinions, Teacher may help them analyze the text.

Show the following on the PowerPoint.

Part1 (the first paragraph) Global warming could be one of the biggest environmental problems facing the 21st century.

Part2 (Para.2) What global warming is.

Part3 (Para.3-4) Its causes and consequences.

Part4 (Para.5) Tips on how to solve the problem.

T: After learning the tips on how to solve the problem, let's discuss what we will do