Sentence 1: Harry spilled water all over his keyboard. 
 Sentence 3: He saw a waterproof one and decided to buy it 
 Sentence 4:  And when got home, he tested its waterproof ability 
 Sentence 5:  But it broke just like his old keyboard 
 Option 1: Luckily—and surprisingly—the spill did no damage. 
 Option 2: So he had to buy another one.