Ответ:

1. The bridge was built last year.

2. Don't touch the fence. It has just been painted.

3. The boy will be asked at the next lesson.

4. Such treasures are rarely found by archaeologists.

5. The ring has already been studied by scientists.

6. The Pyramids are often visited by tourists.

7. New discoveries will be made in the future.

8. The task must be done in time.

9. The text should be translated by pupils.