Sentence 1: Amy and Ben had been together for one month. 
 Sentence 3: For gifts they exchanged foods 
 Sentence 4:  That way there would be no trace 
 Sentence 5:  He gave her chocolates, she gave him skittles 
 Option 1: They were approved of by her parents. 
 Option 2: They had to keep it secret so her parents wouldn't find out.