II
2. unbelievable
3. composer
4. childhood
5. beginning
III
1. The tests were being written by students at eleven o'clock.
2. The tests had been written by students by twelve o'clock.
3. Our son is sent to travel in the south every year.
4. This film will be shown at the cinema.
5. A house is being painted in our street.
6. Some important experiments have been made by the scientists in this laboratory.