1.b

2.a

3.a

4.a

5.a

6.a

7.b

8.b

III

1. grows

2. lost

3. met - became

4. has been

5. saw

6. have never talked - left

7. did you begin

8. have you studied

IV

1. have you done => did you do

2. does => has

3. am => have been

4. have you started => did you start

5. know => have known

6. just see => have just seen

7. happens => happened

8. have met => met

III

1. is reading

2. comes - takes - has

3. met

4. has written

5. was having

6. was cooking

1. Who is cooking in the kitchen?

2. What are Tom and Mary doing in the study room?

3. How are they working for the exam?

4. Where are they learning French?

5. Where are things changing everywhere?

6. How is she singing?

7. What is reading?

8. Who are doing project in the city?

9. What are they helping mum with?

10. What are they talking about?