Sentence 1: Tom had an upcoming test. 
 Sentence 3: The night before the test, he forgot to set his alarm clock 
 Sentence 4:  By the time he woke up, the test was already over 
 Sentence 5:  Tom failed the test 
 Option 1: He studied very hard for the test. 
 Option 2: He studied very hard for the test and woke up on time the next morning to go the exam.