Ghi các công thức của các hóa chất bên dưới : - C ( IV ) và O - Al và O - P ( V ) và O - S ( VI ) và O - Mg và O - Na và O - Ca và O - K và O - Cu ( I ) và O - Ba và O - Ag và O - Zn và O - N ( I ) và O - Fe ( III ) và O - Fe ( II ) và O - Mn ( IV ) và O

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IV. DO AS DIRECTED: A. Change these sentences into exclamatory sentences. 1. This is a very comfortable room⇒ What ......................! 2. There are morden computers ⇒What ......................! 3. She is an intelligent girl ⇒What ......................! 4. That student is excillen ⇒What ......................! 5. He’s very friendly. ⇒What . ......................! 6. This book is very interesting ⇒What ......................! 7. That bicycle is old ⇒ What ...................... ! 8. This cake is very decious ⇒What ......................! 9. They are expensive dresses⇒What...................... ! 10. It is a good diswasher ⇒What...................... ! B. Supply the correct from of the adjectives in parentheses, add “than” where possible. 1.The weather gets (hot) today.⇒...................... . This ruler is (long) that one ⇒ ...................... 3. She is (intelligent) in our class ⇒ ...................... 4. These rooms are (large) those ones ⇒...................... 5. Ho Chi Minh city is (big) Ha Noi ⇒...................... 6. Who is (tall) person in your family? ⇒...................... 7. Among cars, trains and planes, buses are (slow) means of transport. .⇒.................................................. 8. Motorbike are (fast) bikes.⇒...................... 9. What is (long) river in Viet Nam? ⇒ ...................... 10. Winter is (cold) season. ⇒ ...................... C.Complete the second sentence so that it has the same meaning as the first one : 1. Why don’t we go to the beach......................?. ⇒ What about ......................? 2. Nam will visit his parents tonight . ⇒Nam is going ...................... 3. Tim’s father has more vacations than Hoa’s father. ⇒Hoa’s father has fewer ...................... 4. We will have a vacation that lasts for three months. ⇒We will have a ...................... 5. He likes to drink tea after meals. ⇒ He enjoys ...................... 6. Let’s talk about this film . ⇒Why don’t you...................... ? 7.You should wash your hands before meals . ⇒ You ought ...................... 8. What does your father do ?. ⇒ What is ...................... ? 9. This is a really delicious dinner . ⇒ What ...................... ! 10. These books are so interesting . ⇒ What ...................... ! 11. This new refrigerator is bigger than the old one . ⇒The old refrigerator ...................... 12. The table is in front of the chair . ⇒ The chair ...................... 13. I like pink and white . ⇒ Pink and white ...................... 14. The weather is so nice today. ⇒What ...................... ! 15.Where does he live ? ⇒What......................?