Cho CSDL của một cửa hàng bán lẻ gồm các bảng sau. KHACH_HANG(Makhachhang, Hoten, Diachi,Dienthoai) HOA_DON(Makhachhang, makhach, Mahang,ngayban) MAT_HANG (Mahang, Tenhang, Donvi,Dongia) Câu 3. Hãy xác định các liên kết giữa các bảng?

Viết lại câu nghĩa không thay đổi: 13-"I went to Halong Bay last summer". John said.. 14- "I have learnt English for nearly 7 years". Mark said 15-"I'm working in a big company" Hoang said 16- Susan felt sick. She ate four cream cakes. 17- Tom doesn't hurry, he will miss the train 18- My sister is fat because she eats too much. 19-You got bad marks because you didn't work hard. 20- My sister is often sick because she doesn't do physical exercise.

Viết lại câu nghĩa không thay đổi: 7. This book isn't as interesting as that one. 8. No one in Tom's class is as tall as him 12. "I'm going away tomorrow, mother."Leo said. - 9. Joan is the most intelligent girl in her school. 10. A bike is not as expensive as a motobike. 11. "My motorbike lost yesterday" Tom said

Viết lại câu nghĩa không thay đổi: 4. They have painted their house in blue. 5.. Mr Jackson can help you to solve this problem. 6. John is fatter than Tom.

Viết lại câu nghĩa không thay đổi: 1. They opened The Statue of Liberty in 1886. 2. The police are searching for the robber 3. The government will reduce the price of petroleum

Rút gọn mệnh đề 8. Have you found the car which was stolen last week?

Câu hỏi đuôi.. 1. They're going to work in an office, 2. Jack hasn't got a spare pen, 3. Jane's painting a picture, 4. We won't be late, 5. Harry's got fifteen books, 6. Kate and Pat lived in Leeds last year, 7: You didn't feel well, 8:You like football, 9. Richard's bought a new bike, 10: John couldn't answer this question,

Câu hỏi đuôi! 11. I don't leave anything behind, 12.Anna is bringing some wine, 13.Jack'll be home before midnight, 14.Marry was working in Bristol then,, 15. You know who invented the wheel, 16. You don't need me anymore,, 17. The ticket to London doesn't cost a lot, 18.Jane invited the Smiths last Sunday, 19. They aren't too busy to go out, 20. Jean built a restaurant last year,