Sentence 1: Emily's friends invited her to go to the beach. 
 Sentence 3: But her friends encouraged her to come 
 Sentence 4:  Emily sat on the hot sand and watched her friends swim 
 Sentence 5:  She regret going 
 Option 1: But Emily didn't want to because she didn't know how to swim. 
 Option 2: Emily was excited to go swimming.