Sentence 1: Tony has been feeling really tired and dizzy lately. 
 Sentence 3: He went to the doctor and they ran some tests 
 Sentence 4:  The doctor told Tony that he is dehydrated and needs to drink water 
 Sentence 5:  Tony never drank too much water but now drinks a gallon a day 
 Option 1: He'll be at work and then all of a sudden he'll need to sit down. 
 Option 2: He'll be at work and suddenly turn into a cat.