Rút gọn biểu thức: $\sqrt{5+\sqrt{21}}$ + $\sqrt{5-\sqrt{21}}$ - $2\sqrt{4-\sqrt{7}}$

Giải giúp mình 3 câu này mình cần gấp

Turn these sentences into reported speech. (1) 1. She said,” I can’t find my umbrella” → ___________________________________________________________ 2. They said, “We are learning English now” →___________________________________________________________ 3. “ My friend is coming next week”, Tom said. → ___________________________________________________________ 4. “ I’ll help my mum with housework this weekend” →___________________________________________________________ 5.“We shall overcome this difficulty”, they said → ___________________________________________________________ 6.“ My father is a doctor here”, my friend said → ___________________________________________________________ 7.“I am going on holiday tomorrow”, the boy said to his neighbor. →___________________________________________________________ 8.“ You will have to finish all these exercises before next week”, the teacher said to his students → ___________________________________________________________ 9.“ I came back here early yesterday,” she said. → ___________________________________________________________ 10.“ I’ve broken the vase,” she said →___________________________________________________________

25. This is …………………… man I’ve ever seen. A. best B. better C. good D. the best 26. That child behaves ……………………. of all. A. the most carelessly B. the more carelessly C. more carelessly than D. as carelessly 27. She speaks ………………. than I do. A. as quickly B. quickly C. more quickly D. quicklier 28. He didn’t arrive as ………………. we did. A. late as B. late than C. later than D. the latest as 29. You can take ……………………. books as you want. A. as many B. as much C. so much D. too many 30. I am one centimeter ………………. than you. A. tall B. as tall C. tallest D. taller 31. His job is …………………… as mine. A. not so difficult B. not that difficult C. not more difficult D. not very difficult 32. Of the two sisters, Linda …………………… A. is beautiful B. the most beautiful C. is the more beautiful D. is as beautiful 33. The lab is ………………… from the bus stop than the library. A. farer B. farther C. further D. B or C 34. A cat would be ……………….. to look after ………………. a dog. A. easy / than B. easier/ than C. easier/ to D. the easiest/ than 35. Our flat is ……………….. of those in this building. A. larger B. the largest C. as large D. largest 36. This box is the ………………. of the two ones. A. heavy B. heaviest C. heavier D. most heavy 37. "John's grades are really bad." "Yes, but Tim's are……………..' A. worse B. worst C. badder D. so worse 38. "I've got ten dollars" " I think I have……………….. money than you" A. least B. fewer C. less D. fewest 39. “ I don’t like to talk to Mr. David.” - “ He speaks …………………, doesn’t he?” A. more fast B. too fast C. fastly D. much fast 40. I’ll write to you ………………….. I can. A. sooner than B. as sooner as C. as soonest as D. as soon as 41. He is a ……………….. teacher. A. good B. well C. best D. better 42. ……………. the man gets, …………………. he becomes. A. the more old/ the more absent-minded B. the older/ the more absent-minded C. the older/ the absent-minded D. the more old/ the most absent-minded 43. Gorge learns …………………… of all the students. A. bad B. badly C. worse D. the worst 44. I go out less than I used to.. A. I don’t go out more than I used to. B. I used to go out less than I do C. I don’t go out as much as I used to D. I don’t go out as many as I used to 45. The hotel wasn’t as expensive as we thought. A. The hotel was more expensive than we thought B. The hotel was as expensive as we thought C. The hotel was cheaper than we thought D. The hotel was more cheaper than we thought 46. You are 80 years old. I am 90 years old. A. You are younger ten years than I am B. You are ten years younger than I am C. You are ten years younger as I am D. You are ten years youngest than I am 47. Boys often learn Math ………………… than girls. A. well B. good C. the better D. better 48. Don’t walk so …………. Can’t you walk ……………. ? A. fast/ more slowly B. fastly/ more slowly C. fast/ more slow D. fast/ slowlier

Làm đầy đủ + chi tiết giúp mik câu 2,4,11,14 nhé

Từ nội dung văn bản sự hiểu biết xã hội của bản thân , hãy viết một đoạn văn khoảng 2/3 trang giấy ) với chủ đề sự tự tin là chìa khóa vàng mở cánh cửa đưa ta đến thành công Mình cần gấp

Exercise 5: Choose the best answer 1. The weather is …………………….. today than yesterday. A. much better B. very better C. more good D. not so good 2. She is the …………….. member of the family. A. taller B. tallest C. tall D. most tall 3. This box is the ………………. of the two ones. A. heavy B. heaviest C. heavier D. most heavy 4. He was only nine, but he ate ………………….. his father did. A. much than B. as much as C. much more D. as much than 5. Susan is 28, but Jane, her sister, is only 14. A. Susan is older than her sister. B. Susan is twice as old as her sister C. Susan is two times as older as her sister D. Her sister is as twice as old as Susan. 6. The …………………….. the room, the ………………. furniture it needs. A. smaller/ less B. smaller / fewer C. small / fewer D. small/ less 7. Liz is ………………….. than Linda. A. 2 years old B. older 2 years C. 2 years older D. old 2 years 8. There is now much …………………. water in the lake than there was last year. A. smaller B. fewer C. less D. too little 9. Why don’t you buy bananas when they are ……………. apples? A. less expensive than B. less expensive as C. not expensive than D. not so expensive than 10. “Is he a good student?” - “ Yes, he speaks English …………… of all? A. the fluentest B. the most fluently C. the most fluent D. more fluently 11. This apartment is ………………. in the building. A. the biggest than any other one B. bigger than any other one C. biger than any other one D. biggest than any other one 12. The weather has been bad this week. Next week it will probably even………….. A. more badly B. worse C. worser D. worst 13. Lan doesn’t speak Chinese …………… Nam. A. well as B. as good as C. better as D. as well as 14. This coat and that one are ………………. A. like B. alike C. same D. likely 15. ……………….. we jog, ………………. we are. A. The most/ the healthiest B. the most/ the healthier C. The more/ the most healthy D. the more/ the healthier 16. The winter is coming, it is getting ……………………. A. more cold B. the more cold C. colder and colder D. the most cold 17. My car is ………….. yours. A. more cheap and beautiful than B. cheaper and more beautiful than C. more cheap and more beautiful than D. cheaper and beautiful as 18. The problem seems to be ……………………. A. most serious B. more serious than C. more serious D. more and more serious 19. Their house is ………………….. beautiful than mine. A. too much B. so many more C. a lot much D. much more 20. He is ………………. than his brother. A. lazy B. more lazy C. lazier D. as lazy 21. This tooth-brush is ………………… of the pair. A. good B. well C. the best D. the better 22. She is ……………… her father than her mother. A. liker B. more like C. as like D. very like 23. He is one of the …………………. writer in American Literature. A. well-known B. best-known C. most well-known D. B & C are correct 24. This is the …………….. matter of all A. simpler B. simplest C. most simple D. more simple

cần gấp ạ giúp mình với cảm ơn mn giải pt: 2x2-5x+2=0

Viết một đoạn văn tả cơn mưa rào mùa hạ từ 7 - 10 câu (trong đó sử dụng ít nhất một phép so sánh, một phép nhân hóa và một phép ẩn dụ)

so sánh :2021x2021 với 2020x2022