Combine sentences (Rút gọn câu) 1. In many places traditional food has been replaced by international food. International food is getting more and more popular. This could harm traditional culture. 2. People live in the city. People are facing a range of problems in their daily life. One of the problems faced by people is air pollution. Air pollution makes them stressed and depressed. 3. Eating fastfood seems modern and convenient. Children consume too much fastfood. They are gaining weight. The government should tax fastfood heavily. 4. I was going on a holiday at the beach. I bought some swim suit and sunglasses. I changed my mind at the last minute. I wanted to go skiing instead.

24+31= 91+9= 50+50= Thanks trước nha.

cho tam giác nhọn ABC có đường cao là AH. Vẽ HE,HF lần lượt vuông góc với AB,AC.cho góc BAC=a,AH=h.tính AH theo a,h

Exercise 1: Choose the correct answer 1. Without your help, I the technical problem with my computer the other day. A. can’t solve B. couldn’t have solved C. couldn’t solve D. weren’t solved 2. She helped us a lot in our project. We couldn’t continue without her. A. Unless we had her contribution, we couldn’t continue with the project. B. But for her contribution, we could have continued with the project. C. If she hadn't contributed positively, we couldn't have continued with the project. D. Provided her contribution wouldn't come, we couldn't continue with the project. 3. Unless you well-trained, you to the company. A. aren't / will never be admitted B. aren't / will never admit C. are / will never be admitted D. are / will never admit 4. ___________more help, I could call my neighbor. A. needed B. should I need C. I have needed D. I should need 5. Unless you__________all of my questions, I can’t do anything to help you. A. answered B. answer C. would answer D. are answering 6. Had you told me that this was going to happen, I____________it. A. would never have believed B. don’t believe C. hadn’t believed D. can’t believed 7. George wouldn't have met Mary to his brother's graduation party. A. if he has not gone B. had not he gone C. had he not gone D. if he shouldn't have gone 8. ten minutes earlier, you would have got a better seat. A. Were you arrived B. If you arrived C. If you hadn't arrived D. Had you arrived 9. If she a car, she would go out in the evening. A.have B. has C. has had D. had 10. The joke would not be funny if it into French. A. has been translated B. be translated C. was be translated D. were translated 11. We on the beach now if we hadn't missed the plane A. might have lain B. would lie C. could be lying D. would have lain 12. I think you should stop smoking. A. If I am you, I will stop smoking. B. If I had been you, I would stop smoking, C. If I were you, I would stop smoking. D. If I were you, I will stop smoking. 13. If he had been more careful, he__________ A. won't fall B. wouldn't fall C. wouldn't have fallen D. would haven't fallen 14. His health would be improved________ A. if he continued to smoke heavily B. unless he stopped smoking heavily C. if he gave up smoking D. if only he doesn't smoke any more. 15. He was driving very fast because he didn't know the road was icy. A. If he knew the road was icy, he wouldn't drive so fast. B. He hadn't been driving very fast if he would have known the road was icy. C. If he had known the road was icy, he wouldn't have been driving so fast. D. He wasn't driving very fast if he would know the road was icy. 16. I didn’t know that you were at home. I didn't visit you. A. If I knew that you were at home, I would visit you. B. If I had known that you were at home, I would have visited you. C. If I knew that you had been at home, I would have visited you. D. If I would know that you were at home, I visited you. 17. If Nam had passed the GCSE examination, he to take the entrance examination to the university. A. would have been allowed B. would have allowed C. will have allowed D. would allow 18. If it had not rained last night, the roads in the city so slippery now. A. would not be B. must not be C. could not have been D. would not have been 19. If he the lesson yesterday, he could do the test better today. A. has reviewed B. had reviewed C. will review D. reviewed 20. If it warm yesterday, we would have gone to the beach. A. was B. were C. had been D. could be lm hộ mik và giải thích nha

1. O 1 điểm A. popular B. flop C. hot D. programme 2. A 1 điểm A. holidAy B. lAzy C. tAke D. vAcation 3. U 1 điểm A. abUndant B. nUclear C. trUck D. dUmp 4. O 1 điểm A. pOwer B. transpOrt C. shOrt D. repOrt 5. A 1 điểm A. cArbon B. hArd C. lArge D. mArry 6. I 1 điểm A. dIverse B. drIve C. Invention D. crIme 7. T 1 điểm A. suggesTion B. poverTy C. quesTion D. fuTure 8. S 1 điểm A. designS B. sailS C. pedalS D. polluteS 9. U 1 điểm A. bUtton B. fUnny C. sUccess D. fUnction 10. EA 1 điểm A. mEAn B. plEAsant C. EAsy D. hEAt 11. ED 1 điểm A. stoppED B. organizED C. changED D. movED 12. ED 1 điểm A. borED B. trainED C. stayED D. lookED 13. ED 1 điểm A. lovED B. massagED C. helpED D. playED 14. ED 1 điểm A. rainED B. wantED C. travellED D. showED 15. ED 1 điểm A. answerED B. practicED C. smokED D. finishED H

GIẢI HỆ PHƯƠNG TRÌNH BẰNG CẢ HAI PHƯƠNG PHÁP (THẾ VÀ CỘNG ĐẠI SỐ): P/s: Làm nhanh giúp em với ạ, em đang cần gấp. Cảm ơn ạ!

Cho lục giác ABCDEF tâm O.tìm vector DF và AC Mình cảm ơn nhiều ạ

phân tich đa thức thành nhân tử: a)x^4+x^3+4x^2+2x+4 b) (2ab-2cd)^2-(a^2+b^2-c^2-d^2)^2 c) 3x(2x-3y)+(3y-2x)^2-(5x+2y^(5x-2y)

Làm nhanh giúp mình nhé sẽ có 5 sao và ctlhn nhé

Câu 1 (2 điểm). Trình bày những vấn đề xã hội nảy sinh khi các đô thị phát triển quá nhanh và hướng giải quyết ở Đới ôn Hòa? Câu 2 (3 điểm). a) Tại sao lại nói đới lạnh là vùng hoang mạc lạnh của Trái Đất? b) Giới thực vật và động vật ở đới lạnh có gì đặc biệt?