Sentence 1: Opal was in a bad mood. 
 Sentence 3: She had to take care of her baby brother, James 
 Sentence 4:  Luckily, James behaved for the couple hours that they were gone 
 Sentence 5:  Opal had underestimated her brother 
 Given Sentence 2: On our way we saw a sign inviting the public to pick apples.