Cho propylbenzen tác dụng với clo chiếu sáng người ta thu được hỗn hợp ba dẫn xuất monoclo A1, A2, A3 với tỉ lệ % lần lượt là 68%, 22%, 10%. 1/ Hãy viết cơ chế phản ứng theo hướng tạo thành sản phẩm A1. 2/. Hãy tính khả năng phản ứng tương đối của các nguyên tử H ở gốc propyl trong propylbenzen

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I. Xét dấu hàm số : 1. f(x) = (4x2 -1)(-8x2 + x- 3)(2x+9) 3. f( x) = (3x2 + 2x -5)( 4x2 – 1) 4. f(x) = ( -3x2 + 7x - 4)(x2 - 4)(3x-2) II. Giải bất phương trình 1.4x2 – x+ 1 >0 2. -3x2 + x + 4≤ 0 3. x2 - x – 6 < 0 4. -2x2 + 3x + 5 ≤ 0

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IV. Choose the letter A, B, C or D to complete the sentences with given words 1. How much/ time/ day/ you/ spend/ playing game? A. How much time a day do you spend on playing game? B. How much time a day do you spend in playing game? C. How much time a day did you spend in playing game? D. How much time a day did you spend on playing game? 2. Nick/ just/ buy/ a CD/ Vietnamese folk songs/ and he/ think/ he/ enjoy/ listen/ to the melodies. A. Nick just bought a CD of Vietnamese folk songs and he thinks he’ll enjoy listening to the melodies. B. Nick has just bought a CD of Vietnamese folk songs and he thinks he’ll enjoy listening to the melodies. C. Nick did just buy a CD of Vietnamese folk songs and he thinks he’ll enjoy listening to the melodies. D. Nick just buys a CD of Vietnamese folk songs and he thinks he’ll enjoy listening to the melodies. 3. Ping/ not/ mind/ do/ a lot of/ homework/ in the evenings. A. Ping doesn’t mind to do a lot of homework in the evenings. B. Ping didn’t mind to do a lot of homework in the evenings. C. Ping didn’t mind doing a lot of homework in the evenings. D. Ping doesn’t mind doing a lot of homework in the evenings. 4. Marie/ like/ window shopping/ her close friend/ Saturday evenings. A. Marie likes window shopping with her close friend in Saturday evenings. B. Marie like window shopping with her close friend in Saturday evenings. C. Marie likes window shopping with her close friend on Saturday evenings. D. Marie like window shopping with her close friend on Saturday evenings. 5. Why/ not/ we/ help/ our parents/ some DIY projects? A. Why not we help our parents with some DIY projects? B. Why not we help our parents some DIY projects? C. Why don’t we help our parents some DIY projects? D. Why don’t we help our parents with some DIY projects?

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Bài 1. Choose the correct option for each gap in the sentences. Question 1: …………. he spent much money on the film, it wasn't a big success. A. Even B. But C. Although D. Despite Question 2: I enjoyed the film on TV yesterday evening ………. nobody in my family liked it. A. although B. yet C. in spite of D. so Question 3: We didn't find it funny………..it was a comedy. A. in spite of B. despite C. although D. but Question 4: I went to the cinema with my friends yesterday ………… feeling very tired. A. although B. in spite of C. but D. so Question 5: ………….. careful preparation, we have a lot of difficulties in making a new A. With B. However C. Such D. Despite Question 6: Let's go to the Victor Cinema. I'm sure you'll find the film………… A. excites B. excite C. excited D. exciting Question 7: I have never felt as ………… as I did when I watched that horror film. A. terrify B. terrified C. terrifying D. terrible Question 8: We like the film very much. The…………. are unforgettable and the plot is gripping. A. characters B. acting C. style D. action Question 9: The film was so …………… . However, my father saw it from beginning to end. A. interesting B. exciting C. boring D. fascinating Question 10: I was ……… to learn that the director of that gripping film has won the first prize. A. interest B. interests C. interested D. interesting