Cho một số tự nhiên có 5 chữ số mà chữ số đầu tiên là 3. Nếu ta xóa chữ số 3 đó đi thì số đó giảm đi bao nhiêu đơn vị?

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Biến đổi các biểu thức sau về dạng tích

Help em nha!!!!!!!!!!!!!!!!!!!!!!!!!!!

Tìm các giá trị x nguyên để tại đó giá trị của mỗi biểu thức sau là một số nguyên: e. E = (4/x^2-4x + 1/x+2) : (2x-4-x^2)/2x^2+4x

1. The farmers were working ________ the farm when we came . A. on ​​​B. in​​​C. at ​​​D. for 2. The children ran ________ the hill to see the sunset . A. on ​​​B. to ​​​C. up ​​​D. down 3. There used to be a huge old banyan tree ________ the entrance of my village . A. at ​​​B. in ​​​C. on ​​​D. for 4. Can you tell me what happened ________ the end of the film. ​A. at ​​B. on ​​C. from ​​D. in 5. They had to wait at the bus stop ________ a long time. ​A. for ​​B. during ​​C. until ​​D. since 6. Do you collect stamps or other things? Oh, I am a stamp ________ . ​A. collecting ​B. collect ​C. collector ​D. collection 7. What do people do _______living in your village ? ​A. to ​B. for ​C. by ​D. of 8. We’ll play tennis and ________ we’ll have lunch. ​A. so​​​B. so that​​C. then​​D. after 9. When I entered the room, the baby________ quietly. ​A. is sleeping ​B. slept ​​C. was sleeping​D. were sleeping 10. He can help his parents to _______ eggs. ​A. feed​​B. lay​​​C. collect​​D. exchange 11. Ann's birthday is ________ February 14th. ​A.on​​​B. in ​​C. for ​​D. at 12. There were ________flowers that I couldn't decide what to buy. ​A. so little​​B. so much ​C. so few ​D. so many 13. My sister studied hard, ________ she completed her exam successfully. ​A. although ​B. because ​C. so ​​D. as 14. On Tuesday morning, there is a meeting________11.00 am and 1.00 pm ​A. at ​​B. in ​​C. from ​​D. between 15. I prefer dogs ________cats. ​A. from ​​B. over ​​C. on ​​D. to 16. On the weekends, if Mr. Parker is busy, the three boys ________ him on the farm. ​A. help ​​B. helped ​C. to help ​D. helps 17. I'm really sleepy today. I wish I ________in bed. ​A. will be ​B. have been ​C. am ​​D. were 18. Liz took a lot of photos to show the trip________her parents. ​A. for ​​B. about ​​C. at ​​D. to 19. When he was your age, he _______ walk 5 kilometres to school every morning. ​A. use to​​B. used to​​C. be used to​​D. used 20. Will you join us on a ________ trip to Vung Tau ? ​A. two days​​B. two-days​​C. two-day​​D. day-two 21. The Parkers have just gone out _______hamburgers. ​A. to​​​B. for​​​C. with​​​D. since 22. _________ is he going to the farm ? ​A. What​​B. Where​​C. Why​​D. Who 23. Exchange students in the USA _______their parents nearly every Sunday. ​A. phone​​B. phones​​C. phoned ​​D. are going to phone 24. After school she works ________ in a supermarket in the afternoon. ​A. full-time​​B. time-full​​C. part-time​​D. time-part 25. She adviced me ________ after dark. ​A. not go out ​B. not to go out ​C. didn't go out ​D. don't go out 26. This monument ________in the 17th century. ​A. was built ​B. has built ​C. has been built ​D. is built 27. There is a river________across the village. ​A. lying ​​B. running ​C. flowing ​D. reaching 28. She was ________tired that she couldn't do anything at all. ​A. such ​​B. too ​​C. very ​​D. so 29. The tourists spend nearly half an hour ________ photos of the pagoda and the tower. ​A. take ​​B. took ​​C. to take ​D. have taken 30. He went swimming ________sunny morning with his classmates. ​A. for ​​B. on ​​C. in ​​D. at 31. Dalat is one of the ________ areas of Vietnam. ​A. mountaining ​B. mountainer ​C. mountains ​D. mountainous 32. I ________ jeans when I was a child. ​A. don't wear ​B. wasn't wear C. hasn't wear ​​D. didn't use to wear 33. “May I use your phone?”- Ceratainly. _________________.” A. Hold on, please B. Here you are C. It doesn’t matter D. You’re welcome 34. “______________?” – “I am going to ake a table.” A. Why is this wood B. What is this wood for C. How’s this wood used D. Whose is this wood 35. Students will _____ a two- hour examination at the end of the year. A. take​​​ B. make​​ C. do​​ D. come Giải giúp mình với

giúp mình nha câu hỏi mình để trong phần bình luận nha

If you want to (53) your best in an exam, you should be relaxed and so one of the best things to do is to take regular breaks even if they are only for a few minutes. During revision time, you (54) take some time off to go for a walk or play your favourite sport. It is a mistake to take up all physical activities. Exercise can help you to relax. You should (55) at least twenty minutes doing something different every day. Parents don’t like it when their teenage children spend hours on the phone, but, in fact, (56) to a friend is very good for you; parents think that children are (57) time and money; but research says talking to friends gives you a chance to relax, and this will make the time you spend studying more effective. 53. A. write B. go C. do D. make 54. A. shall B. have C. should D. will 55. A. waste B. spend C. relax D. use 56. A. communicating B. saying C. chatting D. telling 57. A. losing B. wasting C. spending D. missing IX. Khoanh tròn một lỗi sai trong phần gạch chân A,B,C,D các câu sau. 58. Nam ate too much cakes at Hoa’s birthday party last night. A B C D 59. Before Hoa moved to here, she used to live in Hue with her parents. A B C D 60. We are going to see a detective’s movie with our friends tonight. Will you join us? A B C D 61. Did you hear the news this morning in the radio ? A B C D 62. He stopped to smoke because it is harmful for his health. A B C D 63. The children laughed happy when they heard the funny story. A B C D 64. She sent her teacher a beautifully Christmas card. A B C D 65. They don’t see Peter yesterday. A B C D

Giúp e đi làm đúng nha e giủi cô làm 2 bài

Những thành tựu chủ yếu của Liên Xô trong cuộc xây dụng CNXH từ sau chiến tranh thế giới thứ hai đến những năm 70 của thế kỷ XX có ý nghĩa gì? "Viết ngắn gọn giúp mình" (Mình đang cần gấp)