Sydney (6) one of the world's greatest cities. It is the cultural and financial heart

Choose the letter A, B, C or D to complete the passage below
Sydney _________ (6) one of the world's greatest cities. It is the cultural and financial heart of Australia. It is ___________ (7) for Sydney Opera House. It is located on Bennelong Point ___________ (8) Sydney Harbor. The opera house was completed in 1973 after 16 years of construction. A Danish architect named Jørn Utzon ____________ (9) the landmark. It was a very __________ (10) to create the building. The top of the opera house looks like sails from a boat or large shells.