Complex sentence: The school hall was adapted for Physical Education classes in the absence of funding for a gymnasium in 1977 and in 1979 the upper storey of the main building was refurbished as a Commonwealth Library, the Jack Miller Library was occupied in early 1980.
Split into simpler sentences: The school hall was adapted for Physical Education classes in the absence of funding for a gymnasium in 1977. In 1979 the upper storey of the main building was refurbished as a Commonwealth Library and the Jack Miller Library was occupied in early 1980.