Answers based on the text:
- True (Gulliver's father was a doctor.)
- True (Gulliver was a sailor on the ship.)
- True (The ship was at sea for a long time.)
- True (The ship broke into pieces because of a terrible storm.)
- True (Gulliver was not drowned because he could swim very well.)
Note: The question asks to answer based on the text. All the statements provided are direct facts mentioned in the text about Gulliver's Travels, making them true according to the text.