Viết các Phương trình Hóa Học biểu diễn các phản ứng hóa học : a) Natri tác dụng vs oxi b) Caxi tác dụng vs oxi c) Đun nóng Kalipemanganat d) Lưu huỳnh tác dụng vs oxi e) Đốt cháy hiđro trong oxi f) Đốt cháy dây sắt trong ko khí tạo ra sắt từ oxit

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37 I suggest (use)…………………………………………………… public buses. 38. You always (complain) ………………………………………… about my cooking. 39. Nobody would listen to the stories (tell)……………………………... by him so many times. 40. Don’t worry! She (be) …………………………………………..in a few minutes. 41. She (sleep)…………………………………….. for hours ! You must wake her up. 42. Tom (wash)…………………………… his hands. He has just repaired the T.V set. 43. Don’t forget to bring my dictionary when you (come)………………………... back tomorrow. 44. We would rather (stay)………………………………….. at home than go out on rainy days. 45. I’m sorry. I (not finish) ……………………………………….this work yet. 46. I (invite)…………………………………….. to her party last weekend. 47. I’d rather we (have)………………………………………… more time together. 48. Is Lan used to (write)………………………………………………………. to Maryam? 49. It took Mary two hours (travel) …………………………………..to the countryside last week. 50. His greatest ambition is (choose)……… (take part) ………..….in the Olympics London 2012. 51. None of the people (invite)……………………………………………..to the party can come. 52. I really don’t know why she (not/enter)…………………the last contest. She (win)…………….the first prize easily. 53. She (leave)………..school last year. Since then she (work) .................... as a waitress at a local pub. 54. They felt tired and hungry, so they (sit) ............ down under a tree and (rest) .............. for lunch. 55. Let’s (get) ............................. the house (clear) ............................... up before he arrives. 56. Last year we (install) ......................... ordinary light bulbs in our house, but now we (use) ....................... energy-saving ones. 57. A: In your places, I (a. go) .......................................... by air. B: If I (b. have) ..................................enough money, I (c. take) ............................... your advice.