Tính số tận cùng của phép tính `(2007*2009*2011*...*2017)-(2002.2004.2006.2008)`.

Dịch ra tiếng anh : Ăn cỗ đi trước,lội nước đi sau

b) Hệ tiêu hoá của chim bồ câu có gì sai khác so với những động vật đã học trong ngành động vật có xương sống ?

1. Cho phương trình: x^2 -2mx +2m -1 ( m là tham số ) (1) a) Tìm m để phương trình (1) có hai nghiệm sao cho: (x1^2 - 2mx1 +3) ( x2^2 -2mx2 -2 ) =50

1. you ever (be) to New York? 2. you ever (eat) Sushi? 3. She (not/come) here for a long time. 4. I (work) here for three years. 5. My father (not/ play) any sport since last year. 6. We (never/watch) that television program before. 7. My wife and I (travel) by air many times. 8. I (have read) that novel by Hemingway several times before. 9. We (not/plan) our holiday yet. 10. I (see) such a beautiful girl before. 11. They (not give) their decision yet. 12. I (read) such a good novel before. 13. My family (own) this farm since 1990. 14. I (lose) my keys, so I can't open that door. 15. John (leave) for Brazil this morning.

a) Mỗi chất lỏng sôi ở ... Nhiệt độ đó gọi là ... b) Trong suốt thời gian sôi nhiệt độ của chất lỏng ... c) Sự sôi cũng là một quá trình chuyển ... , đó là quá trình chuyển từ ... sang ... d) Sự sôi là sự... diễn ra ở cả trên ... của chất lỏng lẫn ...chất lỏng e) Nước sôi ở nhiệt độ ... Nhiệt độ này gọi là ... của nước . Trong suốt thời gian nước sôi , nhiệt độ... f) Ở nhiệt độ cao hơn nhiệt độ sôi chất chỉ tồn tại ở thể ... ; ở nhiệt độ thấp hơn nhiệt độ sôi , cao hơn nhiệt độ nóng chảy chất có thể tồn tại ở thể ... và thể ...

So sánh a và b a, a + 23 < b + 23 b, 5a - 6 > 5b - 6

45. I don't know why Nancy did not go to the meeting. She said she _____ definitely go. A. be B. is C. was D. would 46. The librarian asked us _______ so much noise. A. don't make B. not make C. not making D. not to make 47. If _______ my passport, I will be in trouble. A. I lose B. I'll lose C. I lost D. I would lose 48. If only people _____ keep sending me bills! A. don't B. shouldn't C. weren't D. wouldn't 49. Drive _____ otherwise you'll have an accident. A. more careful B. less carefully C. more carefully D. much more careful 50. The village is ______ the river. A. along B. by C. near D. next 51. I love the police here. ____ everyone from bad people. A. he protects B them protect C. it is protecting D. they protect 52. Jack's mother is 52. His father is 69. Jack's mother is much _____ his father. A. youngest B. younger C. younger than D. as young 53. Money is important, but it isn't ____ thing in life. A. most important B. more important than C. the most important D. the importantest 54. Rarely _____ anyone using typewriters now-a-days. A. you see B. will you see C. you will see D. you have seen 55. The reason why he left ____ the embarrassment. A. is avoiding B. was to avoid C. was avoid D. was to avoiding

1. “ Recycling” means not …………… way. A.throwing things away B.throw things away C.blowing things away D. not blowing things away 2. I think it is good to spend time ……….English pronunciation. A.in B.on C.with D.at 3. Two teams take part in the ………… contest A.fetching – water B.water – fetching B.fetched – water D.water - fetched 4. She is not old ………………….to go out alone in the evening. A.enough B.for C. so that D. that 5. Ha Long Bay, one of the most picturesque sights in Viet Nam, was …………. by UNESCO as world Heritage Site. A.recognized B.signed C.realized D. collected 6. Could you help me ………………this door, please? A.push B.pushing C.pushed D.for pushing 7. At the end of the street there is path ……………. To the river. A.leads B.leasd C.leading D.led 8. All letters ……………….today should arrive tomorrow. A.posted B.post C.to post D.posting 9. When I arrived, there was a big red car ……………outside the house. A.park B.parked C.parking D.parks 10. I live in a pleasant room …………. The garden. A.overlook B.overlooks C.overlooker D.overlooking

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