Ответ:

  1. Helen plays the violin very well. — Yes, she’s a very good violinist.
  2. Where are your children? — They are flying a kite with their uncle.
  3. What do you do at weekends? — We go to the theatre or to the cinema.
  4. We leave the house at 6 every morning. — That’s very early.
  5. Look! Kate is wearing a beautiful suit today. — Yes, it suits her.
  6. Why are they talking so loudly? — They always do.
  7. It is raining today. — Let’s go on a picnic tomorrow.
  8. I am thinking of buying a new bicycle. — That’s a good idea.
  9. What are you reading? — Look! It’s my favourite magazine.

Present Simple выражает привычные или повторяющиеся действия; Present Continuous — действия, происходящие сейчас или временно.