Ответ:

Решение:

  1. When Steve was younger, he used to play golf, but now he doesn't play it a lot.
  2. Somebody told me that Helen arrived in Moscow. So, I decided to visit her.
  3. In my class everybody knew that the sun is a planet.
  4. We will visit their friends next summer.
  5. Kate said her parents were not at home then; they went to their friends.
  6. These cars are driven in Russia; they come from abroad.
  7. When the gallery opens, the picture will be seen by a great number of people.
  8. It's difficult question: it can't be answered spontaneously.