49. the film was interested in finding

46. They can't have done it deliberately.
47. He admitted breaking the windows.
49. They are interested in the film which they've found.
50. It had been reported that the disease has killed more than one thousand people recently.

Bonus: Câu 46: If he had enough time, he could.... 
( Đây có một vài câu không chắc chắn, support for me pls )