VI: 1. I think he is able to speak Japanese well

2. Mr.Minh can't read the newspaper without wearing his glasses

3. Peter really wishes he could play tennis well

4. Although he can't swim himself, John is very keen that his children should learn

5. Besides being unable to sing. Maria couldn't dance either

VII: 1. C

2. D

3. A

4. C

5. A

6. B

7. D

8. A

9. B

10. B

11. C

12. A

13. A

14. C

15. A

III: 1. Alice doesn't like doing sports very much

2. No river in the world is longer than the Nile 

3. How often do you practise playing table tennis?

4. He might not go to university

5. I don;t like this programme because it's boring