số tự nhiên A có 4030 chữ số 1 , soos tự nhiên B gồm 2015 chữ số 2 . chứng minh A trừ B là số chính phương

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giup minh co j co the minh se giup lai nhe :) Exercise 6: Write a paragraph about traffic problems and the solutions, using the cues given and the words to show sequence like: first, second, moreover, in addition, ….at last. 1. Most streets / roads / our city / narrow / in bad conditions. …………………………………………………………………………………………… 2. Many people / not strictly follow / traffic laws / when using the roads. …………………………………………………………………………………………… 3. For example/ they cross / street / wrong places / ride / motorbikes / wrong direction. …………………………………………………………………………………………… 4. Many street vendors / occupy / pavement / display / goods / sale / pedestrians / walk / in the road. …………………………………………………………………………………………… 5. The number of trucks / our city/ very big / so / they / interfere / traffic flow. …………………………………………………………………………………………… 6. Construction / houses and buildings / not carefully planned / so / they / occupy / surface of the roads. …………………………………………………………………………………………… …………………………………………………………………………………………… To solve the traf ic 7. Heavy penalties / use / for careless / dangerous drivers. People / be educated / traffic regulations / the same time. …………………………………………………………………………………………… …………………………………………………………………………………………… 8. In short, I hope / traffic problems / our city / our city / be solved / so that we / feel / comfortable / when / use the road. …………………………………………………………………………………………… ……………………………………………………………………………………………

8. I’m afraid our team will lose the game today. I wish _______. A. our team would win the game today B. our team won the game today C. our team didn’t lose the game today D. our team had won the game today 9. My friends didn’t take part in the game. I wish _______. A. My friends took part in the game B. My friends would take part in the game C. My friends did take part in the game D. My friends had taken part in the game 10. She wishes he ______ his letter of application earlier. A. would write B. had written C. wrote D. would wrote 11. I wish you ______ make so much noise. I’m trying to work. A. shouldn’t B. needn’t C. couldn’t D. wouldn’t 12. It wasn’t fine. I wish _______. A. it was fine B. it would fine C. it will fine D. it had been fine 13. She wishes she ______ to told you the bad news yesterday. A. is not asked B. was not asked C. were not asked D. had not been asked 14. My uncle wishes he ______ time when he was young. A. wouldn’t waste B. didn’t waste C. hasn’t waste D. hadn’t waste 15. -Minh: you speak English very well. –Huong: Yes but I wish I _____ other languages well, too. A. can speak B. am speaking C. spoke D. speak 16. I wish we ____ shopping here together. A. would go B. will go C. can go D. go 17. I’m not able to visit London. I wish I ______go there. A. can B. will C. may D. could 18. I wish that the weather _______ not so warm. A. be B. was C. are D. were 19. I’m sorry I missed your birthday party. I wish I _____ your birthday party. A. wouldn’t miss B. didn’t miss C. hadn’t missed D. had missed 20. I wish you ______ me a new one instead of having it _____ as you did. A. gave/ to repair B. would give/ to repair C. had given/ to repaired D. had given/ to be repair