Một thửa ruộng hình thang vuông có cạnh bên vuông góc với hai đáy, chiều cao 30,5m, đáy bé 79,6, đáy lớn 120,4 m. Biết rằng trung bình 1ha thu hoạch được 62 tạ thóc . Hỏi người nông dân thu hoạch được bao nhiêu kg thóc trên thửa ruộng đó ?

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III. Use phrase or clause of purpose to combine each pairs of these sentences: 4. Angelina Jolie wore a veil. She didn’t want to be recognized. ………………………………………………………………………………………………………. 5. These men were talking in whispers. They didn’t want anyone to hear their conversation. ………………………………………………………………………………………………………. 6. The boy feigned to be sick. He hoped we didn’t make him work. ………………………………………………………………………………………………………. 7. The man spoke loudly. He wanted everyone in the hall could hear him clearly. ………………………………………………………………………………………………………. 8. Doris often goes home as soon as the class is over. She doesn’t want her mother to wait for her. ………………………………………………………………………………………………………. 9. Mr. Thompson is studying Vietnamese. He wishes to read Kim Van Kieu. ………………………………………………………………………………………………………. 10. Alice prepared her lesson carefully. She needed to get good marks. ………………………………………………………………………………………………………. 11. You should walk slowly. Your sister can follow you. ………………………………………………………………………………………………………. 12. She needs a job. She wants to support her parents. ………………………………………………………………………………………………………. 13. The farmer built a high wall around his garden. The fruits wouldn’t be stolen. ………………………………………………………………………………………………………. 14. The notices are written in several languages. Everyone may understand them. ………………………………………………………………………………………………………. 15. Dick is practicing the guitar. He can play for the dance. ……………………………………………………………………………………………………….