Вариант 34

Sam went to the giant aquarium near his house at least three times a week. He liked the fish and crabs, but the most (29) creatures there were sharks. Sam could watch them for hours. He took photos through the glass and collected (30) about them. It surprised him how fast a massive shark could be. Before the aquarium opened, Sam thought it was (31) for sharks to be so quick and graceful. He knew that sharks were (32) but they seldom attacked people. Many people, however, had hunted them and sharks had become endangered. (33) , now there were laws protecting sharks. In the future, Sam wanted to be a (34) and study sharks in the wild.