Saving the earth（The Fourth Period）

2. never have i
3. folded in the pocket was
4. little does he realize
5. not only was
t: well done. besides, we've read a passage in this unit about the earth summit and environmental problems and solutions. what words we've learnt in this unit can help us describe environment problems and solutions?
ss: sustainable development, contaminated drinking water, poor sanitation, air
    pollution, killer, poverty, war, violence, equality, fairness, take action, make changes, education, in harmony with nature...
t: oh. so many. i hope you can remember and use them. we know the earth summit mainly talks about environment problems and solutions. experts from all over the world are welcome to the earth summit, speaking about different topics and discussing new ways to solve old problems. today we are going to listen to the voices of the
  earth summit. and we'll talk about the environment problem again. first, let’s learn the new words in this period.
    (teacher shows the new words on the screen and gives brief explanations.)
   
    ( bb: alternative—alternate; defend against/from; incorrect--correct;  affect/effect; advise sb. (not) to do sth. ,advise doing sth. )
step iii listening and speaking
t: well, now please open your books at page 71. look at the first part in listening and speaking: listen to the speeches from the earth summit and complete the outlines below, i'll play the tape twice continuously. listen carefully and finish your task. at the end ,i'll check your answers.
         (after listening, teacher introduces the next task.)
t: well done. you've understood the speeches exactly. do you agree with what they are saying? work in pairs to talk about this question. write down your thoughts, comments, opinions and questions about what they said. prepare for a few minutes. then we'll go on with the next task. (a few minutes later.)
t: ok. now you have a chance to make your own speech. use your notes and think about what you would like to say. first, write an outline, and then give the speech in class. make sure that you are ready to answer questions and defend your argument. are you clear?
ss: yes.
t: you can begin to prepare tot it now.
        (another few minutes later.)
t: are you ready?
ss: yes.
t: ok. now let's begin our speech. each student should listen to your classmate's speeches carefully and get ready to ask them questions. who'd like to be the first to give your speech? any volunteer7