Ответ:

1)He often asks for my advice.Does he often ask you for advice?My friend often gives me good advice.

2)We know two causes of this disease(illness).We do not know the causes of his illness.What are the causes of his illness?

3)She often complains of pain in her eyes.What is she complaining about?She does not like to complain.

4)The doctor usually examines patients in this office.In which office does the doctor examine patients?

5)I feel pain when the dentist touches this tooth.Do you feel pain when I touch this tooth?I do not feel pain when you touch this tooth.

6)My grandfather is a very sick person.He is sick?I'm not sick ,I feel good.

7)She always tells the truth.I think children don't always say prada.You should tell the truth.

8)She has a very nice voice.I know his voice.Do you know his voice?