I.
2. New curtains had been put up
3. The walls had been painted
4. Light fittings had been installed
5. Some furniture had been delivered
6. New carpets had been bought.
II. The best project will be chosen by the headmaster. The students have been asked by the teachers to do something about the environment. The interesting experiments should be included by the students in their projects. A set of Science books will be given to winners by the school.