Sentence 1: Nicole was a very smart girl who always worked hard. 
 Sentence 3: One day, she wasn't really feeling like doing her best 
 Sentence 4:  Instead of working, she played and talked with friends 
 Sentence 5:  When she saw the consequences of this, she never did it again 
 Option 1: She thought it was very important to always do her best. 
 Option 2: But she knew that she would get good grades even without trying.