15. I don't think this book is as expensive as it is. $=>$ This book is not as expensive as it is. 16. He is the tallest boy in his class. $=>$ No one in his class is taller than him. 17. This is the most delicious cake I've ever tasted. $=>$ I've never tasted a more delicious cake. 18. I've never met any more dependable person than George. $=>$ George is the most dependable person I've ever met. 19. There isn't anybody as kind-hearted as your mother. $=>$ Your mother is the kindest-hearted person. 20. There is no better teacher in this school than Mr John. $=>$ Mr John is the best teacher in this school. EXERCISE 3: Use the correct tense 1. Water boils at 100°C. 2. Does Nam usually get up at 6.00? 3. What do you often have for lunch? 4. She's very clever. She speaks 4 languages. 5. Steve smokes ten cigarettes a day. 6. An insect has six legs. 7. Does she often visit you at the weekend? 8. Mary washes her teeth twice a day. 9. Do you often watch a film in the evening? 10. Does Mary swim very well? 1. I really enjoyed my holiday last January. While it was snowing in Iowa, the sun was shining in Florida.