Keys: 
　　Passage One: 
　　1. Y 
　　2. N 
　　3. NG 
　　4. N
　　5. guaranteed
　　6. Internet access
　　7. two customer satisfaction programs / a customer hotline and a customer call-back program
　　8. higher prices of their pizzas
　　9. reckless driving by their drivers
　　10. the same
　　Passage Two: 
　　1. (N)
　　2. (N)
　　3. (Y)
　　4. (NG)
　　5. (in different settings)
　　6. (what the child is going through)
　　7. (recruit young adults)
　　8. (social inequality)
　　9. (completely sterile or homosexual individuals)
　　10. (secret)
　　Passage Three:
　　1. (N)
　　2. (Y)
　　3. (N)
　　4. (N)
　　5. (use them / capitalize on them / be curious enough to capitalize on them)
　　6. (responsible enough to own a firearm )
　　7. (more, than)
　　8. (prevalent across the schools / common in schools)
　　9. (be shot / be victimized)
　　10. (hunting)
　　Passage Four: 
　　1. (Y)
　　2. (NG)
　　3. (N)
　　4. (Y)
　　5. (hydrogen)
　　6. (the gravitational forces)
　　7. (black band)
　　8. (the same)
　　9. (dwarf planet)
　　10. (size / disproportionately small size)
　　Passage Five:
　　1. (N)
　　2. (N)
　　3. (N)
　　4. (Y)
　　5. (fat soluble vitamins and water soluble vitamins)
　　6. (vitamin A)
　　7. (fracture / breaking their bones)
　　8. (sunlight / sunlight exposure / exposing to sunlight)
　　9. (toxins) 
　　10. (plant and animal tissues involved in metabolism / liver, yeast and dairy products)