giúp em với ahhhhh!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Tính nhanh a)199mũ2 b)51mũ2 c) 201mũ2

Cho xOy ̂ = 130do . Trong góc xOy vẽ tia Oz sao cho xOz ̂ = 400 . Chứng minh rằng: Oy vuong goc voi Oz

Choose the best answer 1. For several years his ambition ________ to be a pilot. A. is B. has been C. was D. had been 2. Henry________ into the restaurant when the writer was having dinner. A. was going B. went C. has gone D. did go 3. He will take the dog out for a walk as soon as he ________ dinner. A. finish B. finishes C. will finish D. shall have finished 4. Before you asked, the letter________ A. was written B. had been written C. had written D. has been written 5. She ________ English at RMIT these days. A. studies B. is studying C. will study D. is going to study 6. She's at her best when she________ big decisions. A. is making B. makes C. had made D. will make 7. We________ next vacation in London. A. spend B. are spending C. will spend D. are going to spend 8. Robert________ tomorrow morning on the 10:30 train. A. arrived B. is arriving C. has arrived D. would arrive 9. Look! The bus________ A. left B. has left C. leaves D. is leaving 10. Mike________ one hour ago. A. phoned B. was phoning C. had phoned D. has phoned 11. I _______my homework as soon as Linda goes here. a. will finish b. will be finishing c. finish d. will have finished 12. Ask her to come and see me when she ________ her work. a. finish b. has finished c. finished d. finishing 13. After you finish your work, you________ a break. a. should take b. have taken c. might have taken d. takes 14. Oil________ if you pour it on water a. floated b. floats c. will be floated d. float 15. When he returned home, he found the door________. a. unlocking b. unlocked c. to be unlocked d. have unlocked 16. That dancing club________ north of the city a. lays b. lies c. locates d. lain 17. Almost everyone________ for home by the time we arrived. a. leave b. left c. leaves d. had left 18. By the age of 25, he ________ two famous novels. a. wrote b. writes c. has written d. had written 19. While her husband was in the army, Janet________ to him twice a week. a. was writing b. wrote c. was written d. had written 20. I couldn't cut the grass because the machine_______ a few days previously. a. broken down b. has been broken c. had broken down d. breaks down 21. We ________English this time last week. a. learned b. were learning c. have learned d. had learned 22. Is it raining? - No, it isn't but the ground is wet. It________ a. rained b. had rained c. has rained d. has been raining 23. Her family________ to America before 1975. a. went b. have gone c. had gone d. would go 24. When I arrived at the party, Martha________ home already. a. went b. have gone c. had gone d. would go 25. Henry________ for 10 years when he finally gave it up. a. has smoked b. has been smoking c. had smoked d. had been smoking 26. Yesterday morning I got up and looked out of the window. The sun was shining but the ground was very wet. It________ a. rained b. has been raining c. had rained d. had been raining 27. We ________ our examination next month. a. have b. shall have c. will have had d. will be having 28. Look that those black clouds! It________ a. is going to rain b. will rain c. would rain d. can rain 29. We________ English this time next Monday. a. learn b. will learn c. are learning d. will be learning 30. We________ this course before the final examination. a. are going to finish b. have finished c. will finish d. will have finished

Gọi S là tập hợp các giá trị nguyên của m để hàm số dưới có 2 tiệm cận đứng giúp em với ạ

Giúp mình vs ạ bài dễ đẻ m.n ăn điểm đay ạ

QUA BÀI "SÔNG NÚI NƯỚC NAM". HÃY VIẾT ĐOẠN VĂN TRÌNH BÀY VỀ Ý THỨC BẢO VỆ QUÊ HƯƠNG ĐẤT NƯỚC CỦ DÂN TỘC TA. EM CẢM ƠN NHIỀU Ạ! EM ĐANG CẦN GẤP NHA MONG MẤY A/C GỬI NHANH!

Passive modal verbs 1. You can't wash this dress. →................................................................................................................. 2. You should open the wine about 3 hours before you use it. →................................................................................................................. 3. Members may keep books for 3 weeks. →................................................................................................................. 4. Passengers shouldn't throw away their tickets as inspectors (thanh tra) may check them during the journey. →................................................................................................................. 5. We shall have to tow (lai dắt) the car to the garage. →................................................................................................................. 6. Visitors must leave umbrellas (dù, ô) and sticks (gậy) in the cloakroom (phòng treo áo khoác). →................................................................................................................. 7. You should have taken those books back to the library. →................................................................................................................. 8. We cannot exchange articles (món hàng) which customers have bought during the sale. →................................................................................................................. 9. You mustn't move this man; he's too ill. →................................................................................................................. 10. When they have widened this street, the roar of the traffic will keep residents (cư dân) awake (thức) all night. →................................................................................................................. 11. You will have to pull down (phá) this skyscraper (nhà chọc trời) as you have not complied with (tuân thủ) the town planning regulations (những quy định quy hoạch của thành phố). →................................................................................................................. 12.They ought to have reported the accident to the police. →................................................................................................................. 13. You must dry-clean it. →................................................................................................................. 14. After that they must return them. →................................................................................................................. 15. You'll have to leave him here. →................................................................................................................. III. Rewrite the sentence using modal verbs in passive. 1. Parents should give children a lot of love.

Chọn đáp án đúng để điền vài chỗ trống trong các câu sau:( Từ câu 15 => 25 nka

Choose the correct answer. 1. An old woman feeds the pigeons. => The pigeons ________________________ A. are fed B. were fed by an old woman. 2. A burglar broke the window. => The window _____________________ A. was broken B. is broken by a burglar. 3. Someone has made a mistake. =>A mistake _______________________ A. was made B. has been made . 4. Everyone is going to love her. =>She _____________________________ A. is going to be loved B. was going to be loved by everyone. 5. Cervantes wrote 'Don Quixote'. =>'Don Quixote' _______________________ A. was written by Cervantes. B. has been written by Cervantes. 6. She is helping my sister. =>My sister ________________ A. is helped B. is being helped by her. 7. Pamela will drive the bus. =>The bus ____________________ A. will been driven B. will be driven by Pamela. 8. I was watering the plants. =>The plants ___________________ A. were being watered B. are being watered by me.