Ответ:

  1. I am a student now.
  2. My parents were at work yesterday.
  3. She is very kind and clever.
  4. We were at the cinema last Sunday.
  5. The weather was cold yesterday.
  6. They are my best friends.
  7. I was ill last week.
  8. My sister is a doctor. She works in a hospital.
  9. The books were on the shelf an hour ago.
  10. He was not at home yesterday evening.
  11. We are happy to see you now.
  12. The film is very interesting.
  13. You were late for the lesson yesterday.
  14. It is a big elephant.
  15. Tom and I were at the park last weekend.