 Complete the following phrase:  In the interwar period, the school underwent material improvements, introducing a library room, a physics and chemistry amphitheater, laboratories for the same subjects and new classrooms. A film projector acquired in 1920 was used in screenings at the end of the week, delighting pupils. The areas first history and ethnography museum was founded by a faculty member in 1928 and opened in an annex. The 1940 Vrancea earthquake and World War II caused significant damage. During the communist regime, the quality of education declined at Unirea, which eventually became an industrial high school. This trend began to reverse after the 