Exercise 9. Supply the correct passive form of the verbs in brackets. 1. This computer ____________________ (use) for two years. 2. America __________________________ (discover) by Christopher Columbus. 3. I think this institution ____________________ (widen) twice since 1999. 4. Sydney Opera House in Australia ____________________(finish) in 1973. 5. My sister is studying law at Viet Nam National University, Ho Chi Minh City now. This university _____________________(situate) in Thu Duc District. 6. The Great Wall in China _______________(build) many centuries ago. 7. The Golden Gate Bridge in San Francisco _________________(complete) in 1937. 8. The University of Cambridge __________________(form) in 1209. It is always considered to be one of the most prestigious universities in the world. 9. BurjKhalifa in Dubai, the highest building in the world,__________________ (open) in 2010. 10. My bike ______________(steal) last week and it __________( not, find) yet.