Use the appropriate forms of the given words to complete the text

James Cameron's "Avatar" [ ] on the screen in December 2009, but the idea [ ] many years before that. Cameron [ ] 80 pages of script for the film in 1994. After that, however, he [ ] not to make the film for many years, because at that time the technology wasn't available to do what Cameron wanted with the film. Instead, he [ ] several documentary films in which he practised using the [ ] visual effects and camera technology. In [ ] films he perfected [ ] techniques and then used [ ] in "Avatar". Cameron said he [ ] about making "Avatar" for many years. Since 1968, he [ ] to make a movie that [ ] people's minds. The film certainly [ ] the public's imagination, it had massive commercial success. "Avatar" [ ] several box office records and [ ] the highest-grossing film of all time, surpassing "Titanic". That's pretty impressive to be the director of the two highest-grossing films ever!