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