Exercise 1

2. She’s been writing articles about global warming since last month OR for a month.

3. Amanda and Pete haven’t been living in New York since a few years ago OR for a few years.

4. They’ve been living in Toronto since 2009 OR for_____ years.

5. They’ve been driving a fuel-efficient car since last year OR for a year.

6. Pete hasn’t been working since last year OR for a year.

7. Pete and Amanda have been thinking of traveling to Africa since last year OR for a year.

8. Amanda has been reading a lot about Africa for a few months OR since a few months ago.

9. Pete has been studying zoology since last month OR for a month OR since he went back to school (last month).

10. Amanda and Pete have been looking for a new apartment since a month ago OR for a month.

Exercise 2

2. has written

3. has won

4. has been

5. has received

6. has been working

 7. has been teaching

8. has been taking

9. has stopped

10. has… been organizing

11. has designed

12. (has) developed

13. has been watching

14. has not been teaching

15. has not stopped

16. has been traveling

17. (has been) giving

18. has gone

Exercise3

2. They've been eating meat-free meals one day a week.

3. They've been using pesticides.

4. They've been choosing OR They've chosen energy-efficient appliances.

5. They've been reducing OR They've reduced home heating and electricity use.

6. They haven't been recycling paper, cans, and bottles.

7. They've bought a fuel-efficient car.

8. They haven't been walking, biking, car pooling, or taking public transportation.

9. They haven't chosen a home close to work or school.

10. They haven't taken a vacation close to home.

Exercise 4

2. Has he won any awards? Yes. He's won many awards.

3. How long has he been retired? He's been retired since 2001(OR for ___ years).

4. How many honorary degrees has he received? He's received more than 20.

5. How long has his foundation existed? It's existed since 1990(OR for ___ years).

6. What has the Foundation been teaching young people? It's been teaching them about the  importance of a healthy environment.

7. What activity has Suzuki stopped? He's stopped going on vacations that require air travel.

8. Has he developed a lot of TV shows? Yes. He's developed many TV shows.

9. How long have people been watching The Nature of Things? They've been watching it for over 30 years.

10. What has Suzuki been doing to spread his message? He's been traveling and giving speeches.

Exercise 5

taken --> been taking

been writing --> written

been winning --> won

've studying

    ^

  been

have --> has

been finishing --> finished

read --> been reading

been reading --> read

've been started --> 've started