Circle the best option to complete each sentence: 13. The inhabitants wrote a letter of complaint to the local ............ about the noise from the factory.A. author B. authorities C. authority D. authorized 14. Using ................. transport is a good way to reduce traffic jams and air pollution. A. common B. private C. public D. train 15. I will be ................... if she manages to sell that motorbike at high price. A. surprise B. surprised C. surprising D. to surprise 16. Unless you understand, I .......... explain it again to you.A. am B. was C. Will D. would 17. If you know where she lives, please let me ......................................... A. know B. knew C. known D. to know 18. If he ............. a student, he will get a discount.A. is B. was C. Were D. will be 19. ........................ you are interested in this film, don’t go to see it at any cost. A. If B. Unless C. Because D. So 20. If you like that book, I will give it .......... you as my present.A. for B. from C. at D. to 21. I won’t go unless you ............... me back the money. A. to pay B. paid C. paying D. pay (ko cần giải thích đâu)

Bài 6 (1 điểm): Cho hình thang ABCD có góc A = góc B = 90°, AB = BC = 1/2 AD. a) Tính các góc của hình thang b) Chứng minh AC vuông góc với CD giúp em bài 6 với ạ kèm hình luôn

Circle the best option to complete each sentence: 5. Is he really .................... that you can’t come there ? A. disappoint B. disappointed C. disappointing D. to disappoint 6. I think most children are creative enough to write ..................... poems. A. beauty B. beautiful C. beautifully D. beautify 7. It is our policy to ........................ forests and increase forestation. A. protect B. protecting C. to protect D. protected 8. Everyone must take part in .............................. deforestation. A. prevent B. preventing C. to prevent D. prevented 9. I suggest .................. to the movies.A. go B. to go C. going D. went 10. They made their living by ........................ fish in the ocean everyday. A. catch B. catching C. to catch D. caught 11. .................... means cutting or over- harvesting trees for lumber or pulp, or clear the land for other human activities. A. Forestry B. Forestation C. Deforester D. Deforestation 12. Some farmers don’t like ..................... the ground with the pesticides. A. spray B. spraying C. throw D. throwing (khoanh theo cảm hứng nhé,tôi đang cần gấp)

Bài 5 (1 điểm): Cho tam giác đều ABC, hai đường cao BN, CM. a) Chứng minh tứ giác BMNC là hình thang cân b) Tính chu vi của hình thang BMNC, biết chu vi tam giác ABC bắng 24 dm. giúp em bài 5 với ạ !!!!!!!!!!!

Giúp e với các ac ơi E sẽ đánh giá 5* và cho ctlhn ạ^^

1 tinh a) -1/16 + -1/24 b) -18/10+0,4 c) -1/8 - 3/20 b) 1/2 - (1/3+1/10) b) 1/2 - -1/3 + 1/23 + 1/6 d) 2/5 + (-4/3) + (-1/2) 2 tim x a) x + 2/3 =4/5 b) x - 2/7 = 7/21 c) 1/20 - (x - 8/5 ) = 1/10 d) 16/5 -x = 4/5 - 3/10 33 tinh nhanh M = 1/2 . 3 + 1/3 . 4 + 1/4 . 5 + ...................+ 1/19 . 20

Tìm số tự nhiên N nhỏ nhất sao cho n chia cho 3,5,6 có số dư là 1;3;4

( $x^{2}$ + cx+ 2)(ã+b)= $x^{3}$ + $x^{2}$ -2 Gấp

1.I haven’t played football since for 2 years. =>The last time …………………………....................................….....................……. => I last ......................................................................................................................... =>It is ............................................................................................................................ 2.We haven’t seen Tom for 5 weeks. =>We last …………………………………………...................................................... =>It is ........................................................................................................................... => The last time............................................................................................................ 3.It hasn’t rained for a fortnight. =>The last time ………………………………..................................................…….. =>It last …………………………………………….................................................... =>It is ......................................................................................................................... 4.Lucy hasn’t worn that dress for a month. =>The last time …………………………………….............................................…… =>It is ........................................................................................................................... => Lucy last ................................................................................................................... 5.My father hasn’t been to Vung Tau for 2 years. =>The last time …………………………………………............................................. => My father last =>It is ........................................................................................................................... 6. I haven’t seen Henry for two years. =>It is ………………………………………………...............................................… 7. Tim has not had his hair cut for over 3 months. =>It is ………………………………………………...............................................… 8. I haven’t enjoyed myself so much for years. =>It is ………………………………………………..............................................…. 9. I haven’t eaten this kind of food for 5 years =>I last ………………………………………………..............................................…. 10. It is five years since I last met David. =>I haven’t ………………………………………..........................................………

although as long as because even if so that unless until while 1. She turned down that job offer it involved working shift, which prevented her from taking care of her family. 2. You can use my car you bring it back before 5.00 as I will need it by then. 3. We will have a good harvest this year it rains and prevents us from harvesting our crop. 4. We are going to import a new assembly line we can improve our product quality. 5. he has become a millionaire, Tom still drives his old car to work and leads a modest life. 6. You have to finish your report it takes you all night. 7. The little girl didn't eat anything her mother came back from work. 8. It's difficult to find the parking lot. So you can stay in the car I go into the store. I'll be back in just a few minutes. 9. University education is always necessary it's possible to get a good job without a degree. 10. he's eating a lot, he can't gain weight and still looks very thin.