bài 1: Tìm ba số tự nhiên liên tiếp biết tổng của số đó là 84 Bài 2: Bố hơn con 30 tuổi. Tuổi con bằng 1/6 tuổi bố.Tính tuổi của mỗi người.

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III. Write the second sentence so that it has the same meaning to the first one. 1. They are building a new subway around the city. (Change into passive voice) → 2. People will not use that old building from now on. (Change into passive voice) → 3.We will reduce energy consumption as much as possible.(Change into passive voice) → ...................................................................................................................................... 4.Solar energy is free. Solar is inexhaustible. (not only ... but also) → ...................................................................................................................................... 5. How will people learn languages in the future?(Change into passive voice) → ...................................................................................................................................... 6. We spent 4 hours traveling to Halong Bay. (took) → ...................................................................................................................................... 7. Nobody is allowed to use the automated machine without permission. (if) → ...................................................................................................................................... 8. It doesn’t cost much to run a solar power system. → Running ................................................................................................................ 9. Tom doesn’t live with his parents any more. (used to) → ...................................................................................................................................... 10. We spent 4 hours to traveling to Halong Bay. (took) → ...................................................................................................................................... 11. We didn’t find it funny although it was a comedy. (however) → ...................................................................................................................................... 12. The ending of “The Lion King” is moving. (find) → ...................................................................................................................................... 13. Lan was sick yesterday. Nevertheless, she still went to school. (in spite of) → ...................................................................................................................................... 14. It is predicted that all the areas of Asia can be urbanized by 2050 (would) → ...................................................................................................................................... 15. Mary has never been to Viet Nam before. (first) → ...................................................................................................................................... 16. There are many places worth seeing in London. (interest) → ...................................................................................................................................... 17. Could you help me to send this letter to my boss? (would) → ...................................................................................................................................... 18. My grandmother often lived in the countryside when she was young. (used to) → ...................................................................................................................................... 19. I often walked to school with my friends when I was a child. (used to) → ...................................................................................................................................... 20. Let's go to the cinema this Saturday. (how) → ...................................................................................................................................... 21. Although the film didn’t receive good review from critics, many people went to see it. (however) → ......................................................................................................................................