Check the students' homework. Let some of the students read their answers one by one. Give explanations where necessary.

Suggested answers to Exercises 2-6 on Pages 66 and 67 (Workbook):

Exercise 2:

2. will have spent 3. will have become 4. will have invented

5. will have been 6. will have died

Exercise 3:

2. By the end of decade he will have discovered a treatment that can cure all kinds of cancer.

3. By the time he's thirty-five he will have become a professor.

4. By the end of career he will have received several honorary doctorates from famous universities.

5. By the end of next year he will have finished writing his PhD paper.

6. By 2010 he will have written a book about epidemic.

7. By next summer he will have been to fifteen countries.

8. By 2015 he will have done a lot of research on cancer.

Exercise 4:

2. will be watching 3. will be driving 4. will...be using

5. will be putting up 6. will be writing; will be working

Exercise 5:

2. will have written 3. will have taken

4. will have received 5. will have written

6. will be looking

Exercise 6:

2. won't go 3. are you going to do 4. will be working 5. will be meeting

6. will...be sitting 7. Will you have cooked 8. will have been 9. won't have had

10. will be 11. will not have had 12. will have made 13. Will you go out

14. will have had 15. will have finished

Step II Speaking

T: So far we've talked about the rapid development of science and technology. We