7. B

8. D

9. C

10. A

          

 1. has taught

2. have made

3. will get

4. gets

5. often doesn't rain

6. is sitting

7. is dancing - is singing

8. will walk

9. was cooking - rang

10. have changed

11. Will I come

12. is sleeping

             

1. I have played the piano for 3 months

2. Joe hasn't heard from his family since June

3. My father hasn't met his brother for 20 years

4. This is the first time I have seen that play

5. Shall we go to the cinema tonight?

6 When did you see Mary?

7 I go to school early

8 She has never seen snow before

7b already

8d buys

9c are

10a played

5.1 has taught

2 have made

3 will get

4 gets

5 often doesn't rain

6 is sitting

7 is dancing/is singing

8 will walk

9 was cooking/rang

10 have changed

11 Will I come

12 is sleeping

6.1 I have played the piano for 3 months

2 Joe hasn't heard from his family since June

3 My father hasn't met his brother for 20 years

4 This is the first time I have seen that play

5 Shall we go to the cinema tonight?

6 When did you see Mary?

7 I go to school early

8 She has never seen snow before