Bài 4: Điền giới từ thích hợp 1. Lan'll have a party ...................... Friday evening. 2. Would you like to come .......... my house ............lunch? 3. She takes care ............. her family. 4. She works .........a local supermarket. 5. My mother works...............the field............. my father. 6. Does your father work ............. . Hanoi? 7. David is good ................... . Math. 8. What do you do ............. your free time? 9. Are you interested ............. . sports?. 10. There's a good film ............. . ......... the moment. 11. Thanks .......... . your letter. 12. I'll see my mom and dad ................ . their farm. 13. We have to work hard .......... home and................ school 14. We'll visit her .......... Christmas. 15. Are you tired ............. . watching TV? 16. She often brings them ............... school. 17. He works .......... a factory. 18. We always go to Ha Long Bay .......... vacation. 19. Tell me more .......... . your family. 20. Can you send me a photo .......... . your family? 21. He goes .......... the city ............his wife. 22. It takes 18 hours to get .........Hanoi .......... coach. 23. We write .......... each other twice a week.

Bài 3: Chia động từ cho đúng 1. In all the world, there (be) __________ only 14 mountains that (reach) __________above 8,000 meters. 2. He sometimes (come) __________ to see his parents. 3. When I (come) __________, she (leave) __________for Dalat ten minutes ago. 4. My grandfather never (fly) __________ in an airplane, and he has no intention of ever doing so. 5. We just (decide) __________ that we (undertake) ____________ the job. 6. He told me that he (take) __________ a trip to California the following week. 7. I knew that this road (be) __________ too narrow. 8. Right now I (attend) __________ class. Yesterday at this time I (attend) __________class. 9. Tomorrow I'm going to leave for home. When I (arrive) __________at the airport, Mary (wait) __________ for me. 10. Margaret was born in 1950. By last year, she (live) __________on this earth for 55 years. 11. The traffic was very heavy. By the time I (get) __________to Mary's party, everyone already (arrive) __________ 12. I will graduate in June. I (see) __________ you in July. By the time I (see) __________ you, I (graduate) __________. 13. I (visit) __________ my uncle's home regularly when I (be) __________ a child. 14. That book (be) __________ on the table for weeks. You (not read) __________ it yet? 15. David (wash) __________ his hands. He just (repair) __________ the TV set. 16. You (be) __________here before? Yes, I (spend) __________ my holidays here last year. 17. We never (meet) __________ him. We don't know what he (look) __________ like. 18. The car (be) __________ ready for him by the time he (come) __________tomorrow. 19. On arriving at home I (find) __________that she just (leave) __________a few minutes before. 20. When we (arrive) __________ in London tonight, it probably (rain) __________. 21. It (rain) __________ hard. We can't do anything until it (stop) __________ 22. Last night we (watch) __________TV when the power (fail) __________. 23. That evening we (stay) __________up to talk about the town where he (live) __________for some years. 24. I (sit) __________down for a rest while the shoes (repair) __________. 25. Half way to the office Paul (turn) __________round and (go) __________back home because he (forget) __________to turn the gas off. 26. London (change) __________a lot since we first (come) __________ to live here. 27. While we (talk) __________on the phone the children (start) __________fighting and (break) __________a window 28. He used to talk to us for hours about all the interesting things he (do) __________ in his life. 29. You know she (stand) __________looking at that picture for the last twenty minutes. 30. I (spend) __________ a lot of time travelling since I (get) __________this new job. 31. When we (be) __________ at school we all (study) __________Latin. 32. When I (meet) __________ him, he (work) __________as a waiter for a year. 33. After he (finish) __________ breakfast he (sit) __________down to write some letters. 34. She (have) __________a hard life, but she's always smiling. 35. I think Jim (be) __________ out of town.

3. a) Phân tích thành nhân tử x³ + y³ + z³ - 3xyz b) Chứng minh rằng nếu x² - yz = a , y² - zx = b , z² - xy = c ( x,y,z ∈ z ) thì ax + by + cz chia hết cho a + b + c

students are now getting more stress from school. Being a student , what do you think are the best ways to get over stress?

Tìm điều kiện để biểu thức sau là p/s a) 4/n-3 ( với n thuộc Z) v) n+4/n( với n thuộc Z)

Giúp mik viết lí thuyết từ phần số từ, chỉ từ đến phần câu trần thuật đơn ( ko copy) Cảm ơn trước ạ

help me help me help me vote + lếu lều

N*, N, Z, Q có mối quan hệ gì với nhau?

*Passive voice 1.It is better to do the homework right now. -> It is better that 2. They determined to look for the missing girl. -> They determinded that 3.The driver has taken my son to shool. => I have had 4. Someone sopke ill of me. => I had 5.Someone seems to have made a terrible mistake. => A terrible mistake seems 6.You order me and I am tired of it. => I am tired of 7. Before they invented printing people had to write everything. => Before printing

2. Cho a, b, c ∈ Q thỏa mãn điều kiện ab + ac + bc = 1 . Chứng minh rằng ( 1 + a² ) ( 1 + b² ) (1 + c² ) là bình phương của một số hữu tỉ