6. Sydney house was completed since 1973.
7. Was aspirin discoverd by Dresser since 1889?
9. Some more schools will be built by the goverment next year.
10. She  was took to the airport by a friend of her.
11. Hoi An is being visited by Nhi and her parents now.
12. How many tons of rice are exported by VN every day?
4. They was collected used glass and are being sent to the factories.