11. With a smart watch, you will ________ your friends in other countries. A. speak B. say C. talk D. contact 12. ________ pencils and paper, every studentwill have a computer. A. Instead of B. By C. at D. Instead 13. “Do you think we should put a ________ bin in every classroom in order to keep it clean?”. A. recyclable B. recycling C. recycled D. reusable 14. “Why do you often forgetto ________ the lights when you go out of the classroom?” A. close B. turn off C. turn on D. shut down 15. We might have a ________ TV to watch TV programmes from space. A. automatic B. wireless C. local D. remote 16. I ...................any letter from him yet. A. haven’t received B. received C. will receiveD. don’t receive

Bài 1: Cho ∆ABC cân tại A ( 𝐴̂<900), vẽ BD vuông góc AC và CE vuông góc AB. Gọi H là giao điểm của BD và CE. a) Chứng minh : Tam giác ABD = Tam giác ACE b) Cho 𝐷𝐵𝐶̂=250tính số đo góc BCE. c) Chứng minh Tam giác AED cân d) Chứng minh AH là đường trung trực của BC

giup minh bai 2 vs nha mng 50 ddiem

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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Bài dưới viết ngược lên bài trên nha. :3