Đốt cháy hoàn toàn một ancol X thu được CO2 và H2O có tỉ lệ số mol tương ứng là 3 : 4. Thể tích khí oxi cần dùng để đốt cháy X bằng 1,5 lần thể tích khí CO2 thu được (ở cùng điều kiện). Công thức phân tử của X là

Bài 1: Chuyển các câu sau sang câu bị động Emma ordered this air ticket for her mother. She lends her friend his new dress. He left his relatives seven million dollars. The shop manager handed these gifts to the customer. The board of directors awarded the first prize to the outstanding employee. Has she sent the christmas cards to her family? We gave Anna some apples and some rose flowers. My father moved the fridge to the second floor. My mother bought some cups of coffee to the visitors in the kitchen. The manager didn’t take the note to the assistant.   Bài 2: Chia dạng đúng của động từ trong ngoặc Brian had his car (repair) ………….. by a mechanic. John got David (type) ……………… his paper. We got our house (paint) ……………… last month. Dr James is having the students (write ) ………………. a composition Laura got her transcripts (send) ………………. to the university. Daniel is having his hair (cut) ………………… tomorrow. Will Mrs. Ellen have the porter (carry) ………………. her luggage to her car?

17 My friends and I usually play soccer ____ Sunday afternoon. A. on B. into C. at D. for Question 18. She asked me __________________watching films.. A. to stay up late B. not to stay up late C. didn’t stay up late D. to not stay up late Question 19. Let’s dance together,………….? The party is so wonderful. A.shan’t we B.will you C.shall we D.won’t you Question 20. I like living in the country………………I’m interested in the natural world. A. Therefore B. but C. although D. because Question 21. - Mary: "This dictionary is for you. I hope you find it useful." - Peter: "__________ " A. Thanks. I'll do it. B. Thanks. It's very kind of you. C. Yes, please. D. No problem! Question 22. -Tom: "Should we use solar energy to protect the environment?" -Mary: "__________" A. No, thanks B. You're welcome. C. That's a good idea. D. Yes, I'll go. Question 23. Scientists are looking for an __________way to reduce energy consumption A. effect B. effectively C. effective D. effectiveness Question 24. Giving lucky money to children and the elderly is one of the most common __________during the Lunar New Year. A. behaviors B. habits C. events D. practices

Choose the best answer to fill in the blank. 6. You can save money while shopping by only buying ________ you need. A. this B. what C. it D. that 7. If we ________ all the trees, there will be no more oxygen for us to breathe. A. cut down B. cut off C. cuts D. cutting 8. Our dream house will use only solar energy so that we can make the ________ clean and green. A. home B. nature C. kitchen D. Entertainment 9. A hi-tech robot will help us ________ children while we are away. A. look in B. look at C. look out D. look after 10. We should have recycling binsin each classroom for ________ things. A. reused B. use C. reuse D. reusable

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Một hợp chất X gồm 2 nguyên tử Z liên kết với 5 nguyên tử O và có phân tử khối nặng hơn khí nitơ là 3,86 lần a) Xác định phân tử khối của hợp chất trên b)Xác định nguyên tử của Z,tên nguyên tố và hoá trị của X

I. VOCABULARY Choose the word or phrase that best completes each sentence below. 1. My brother is one of the most famous stamp ______ in Hanoi. A. collection B. collectors C. collector D. collectors 2. _____ is the hobby I spend most of my time on. A. Photograph B. Photographing C. Photographer D. Photography 3. Like most of her friends, Lan often plays _____ games in her free time. A. board B. boarding C. boarder D. aboard 4. Swimming is fun because you can play in the water and keep _____ at the same. A. fit B. fitted C. fitting D. fitly 5. Children should eat _____ food like orange or vegetables instead of fast food. A. unhealthy B. healthy C. health D. healthily 6. My mother always takes good _____ of me. A. care B. look C. eye D. mind 7. My father is a ____, so he has to read a lot of newspaper for ideals. A. writing B. write C. writer D. written 8. The girl fell asleep as soon as she got _____ the bus. A. on B. off C. out D. up 9. His painting are very _____ and expensive, he’s a true artist. A. beauty B. beautiful C. beauty D. beautifully 10. If you don’t hurry up, you will be late _____ school. A. for B. at C. in D. to

II. GRAMMAR Choose the word or phrase that best complete each sentence below. 11. Richard: “Do you enjoy doing the school quiz?” Gabriel: “_____” A. Of course, I will. B. What’s the matter? C. That’s the least I could do. D. It was lots of fun. 12. Tyler: “Let’s buy this pink purse for Mum!” Selena: “_____” A. Yes, you’re right. B. Good idea! C. I’m fine, thanks. D. You must be a fool! 13. My sister is keen _____ sports. She plays a lot of tennis and badminton in her free time. A. on B. of C. about D. at 14. Quang is good _____ Math, he can solve any problem very quickly. A. at B. to C. about D. on 15. We can make flower vases or lamps _____ old glass bottles. A. of B. up C. from D. in 16. I find _____ a useful sport for my health. A. swim B. swimming C. swimmer D. swam 17. _____ do you find dancing as a hobby? A. What B. Who C. Why D. How 18. When my father retired, he took _____ golf as a hobby to stay healthy. A. on B. at C. up D. in 19. Hoa loves reading comics, but she says she _____ this hobby in the future. A. will continue B. won’t continue C. continues D. doesn’t continue 20. I think in the future more people _____ gardening. A. will enjoy B. enjoy C. enjoyed D. enjoying