Một mảnh vườn hình thang có độ dài hai cạnh đáy lần lượt là 25,2m và 12,8m. Chiều cao bằng trung bình cộng hai đáy. Người ta trồng dưa hấu trên mảnh vườn đó, trung bình cứ 100 mét vuông thu hoạch đượ 150 kg dưa hấu. Hỏi trên cả mảnh vườn đó người ta thu được bao nhiêu tạ dưa hấu?

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19. Every morning , I (watch)_______tv at 10.00, but today I (Listen ) _____ to music at 10.00. 20. Everyday , I (go) __________to school by bike but today I go to school by motorbike. 21. Every morning, my father (have) _______a cup of coffe but today he (drink)_________ milk. 22. At the moment, I(read)_______________a book and my brother (watch)_______ TV. 23. Hoa (live)________________in Hanoi ,and Ha (live)________________in HCM City. 24. Hung and his friend (play)_______________badminton. 25. They usually (get up)___________________at 6.oo in the morning. 26. Ha never (go)_______fishing in the winter but she always (do)____________ it in the summer. 27. My teacher (tell)__________________Hoa about Math. 28. There (be)____________________ animals in the circus. 29. _______________he (watch)______________TV at 7.00 every morning? 30. What _____________she (do ) _________________at 7.00 am? 31. How old _________she (be)? 32. How ___________she (be)? 33. My children (Go)________________to school by bike. 34. We (go)_______________to supermarket to buy some food. 35. Mr. Hien (go)________________on business to Hanoi every month. 36. Ha (like)______________coffee very much, but I (not like)______________it. 37. She (like )________________Tea, but she (not like)____________________coffee. 38. I (love)_______________ cats, but I (not love)__________________dogs. 39. Everyday ,I (go)______to school on foot, but today I (go)________________to school by bike. 40. Who you _______ (wait) for Nam?      -No, I ______________________(wait) for Mr. Hai. 41. My sister (get)______________ dressed and (brush)_______her teeth herself at 6.30 everyday. 42. Mrs. Smith (not live)_____in downtown. She (rent)_______in an appartment in the suburb. 43. How _________your children (go)_________________to school everyday? 44. It’s 9 o’clock in the morning. Lien (be)________in her room. She (listen) _________to music. 45. We_______________________(play) soccer in the yard now. 46. My father (go)___________ to work by bike. Sometimes he(walk)______________. 47. _________You (live)________near a market? _ It (be)____________noisy? 48. Now I (do)_____________the cooking while Hoa (listen)_______________to music. 49. At the moment, Nam and his friends (go)_______________________shopping at the mall.