Sentence 1: Will greatly missed his grandparents. 
 Sentence 3: His grandparents didn't own a cell phone at the time 
 Sentence 4:  One day, Will got a random call on his cell phone 
 Sentence 5:  He answered it and was surprised to hear from his grandparents 
 Given Sentence 2: He wished he had more friends, but his classmates were aloof.