rewrite the text using the passive.Ust the agent(s) where necessary
Gustave Eiffel desidned the Eiffel Tower.Workers built it betwen 1887 and 1889.They used iron to build it.The City Mayor opened it to the public on Mau 6th 1889.Many tourists viisit the tower every year.They buy souvenirs take photos of paris and admire the view from the top.