I need you to check these sentences I have to prepare for tomorrow.

1) The film opens with Captain Robert Walton on his ship sailing north of the Arctic Ice. His ship becomes ice-bound (I need a synonym) and Walton spots a figure travelling across the ice on a dog sled.
2) It is Viktor Frankenstein. Viktor's dogs escape and disappear in the fog. Viktor starts telling the Captain his story.
3) When he was a boy he used to chase fireflies and he wanted them to glow at his bedside. He has always been curious and hungry for knowledge. His mother warns him not to devote his entire life to study. His mother dies giving birth to a child.
4) When he visits his mother's grave he promises that in the future no one will ever die. Viktor leaves Geneva and goes to Ingolstadt, where he is first introduced to modern science.

1) The film opens with Captain Robert Walton on his ship sailing north of the Arctic Circle. His ship becomes stuck in the ice, and Walton spots a figure travelling across the ice on a dog sled.

2) OK

3) When he was a boy, he used to chase fireflies, and he wanted them to glow at his bedside. He has always been curious and hungry for knowledge. His mother warns him not to devote his entire life to study. His mother dies, giving birth to a child.

4) When he visits his mother's grave, he promises that in the future no one will ever die. Viktor leaves Geneva and goes to Ingolstadt, where he is first introduced to modern science.