Sentence 1: School on a Saturday would normally be torture. 
 Sentence 3: He had always wondered how they survived the weekend 
 Sentence 4:  He was most curious about the turtle which wandered around the class 
 Sentence 5:  He discovered that the turtle wore a diaper 
 Option 1: Today, Harry was there to eat food in his home economics class. 
 Option 2: Today, Harry was there to take care of the animals in his biology class.