Sentence 1: The trip had been a great success so far. 
 Sentence 3: Sherry wanted to try something new 
 Sentence 4:  She saw a poster for snorkeling and decided to go for it 
 Sentence 5:  She couldn't believe all the beautiful fish that were in the water 
 Option 1: The only thing Sherry didn't have time to try was snorkeling. 
 Option 2: There were only a few more days left before they had to return.