Bill and Simon were good friends. One summer they were on v____. They wanted to sail around the Caribbean Sea in their boat ____ two weeks.

    During their trip, they saw many whales(鲸). Bill and Simon were very e____ because they had wanted to see them very much. Unluckily, w____ they were watching them, the whales began to hit(撞) the side of the boat.

    Suddenly, w____ started to come in, and they realized(意识到) they were in trouble. They ____ (quick) jumped into the lifeboat before the boat sank(沉没), and watched it ____ (消失) under the sea.

    Luckily, they had enough food and water for about twenty d____. They also had a fishing line and a machine which could change sea water into drinking water. These two things helped them to survive during their terrible experience.

    For the next fifty days they caught about ten fish a day and ____ (eat) them. They saw about twenty ships, but although they waved and shouted when the ships were passing, nobody saw them. They were becoming ____ (weak). Then, just as they were beginning to lose hope, a fishing boat saved them.