$(-2-y)^{2}$ = ? Dùng hằng đẳng thức.

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Làm hết giúp mình nha 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.

Làm hết giúp mình nha 21. Almost everyone _____ for home by the time we arrived. A. leave B. left C. leaves D. had left 22. By the age of 25, he ____ two famous novels. A. wrote B. writes C. has written D. had written 23. When her husband was in the army, Mary ____ to him twice a week. A. was reading B. wrote C. was written D. had written 24. I couldn’t cut the grass because the lawn mower ____ a few days previously. A. broke down B. has been broken C. had broken down D. breaks down 25. I have never played badminton before. This is the first time I ___ to play. A. try B. tried C. have tried D. am trying 26. Since _____, I have heard nothing from him. A. he had left B. he left C. he has left D. he was left 27. After I _____ lunch, I looked for my bag. A. had B. had had C. have has D. have had 28. By the end of next year, George _____ English for two years. A. will have learned B. will learn C. has learned D. would learn 29. The man got out of the car, ______ round to the back and opened the book. A. walking B. walked C. walks D. walk 30. Henry _____ into the restaurant when the writer was having dinner. A. was going B. went C. has gone D. did go 31. He will take the dog out for a walk as soon as he ____ dinner. A. finish B. finishes C. will finish D. finishing 32. I will be glad if he _____ with us. A. had gone B. did go C. went D. goes 33. Ask her to come and see me when she _____ her work. A. finish B. has finished C. finished D. finishing 34. Turn off the gas. Don’t you see that the kettle ______? A. boil B. boils C. is boiling D. boiled 35. Tom and Mary ____ for Vietnam tomorrow. A. leave B. are leaving C. leaving D. are left 36. He always ______ for a walk in the evening. A. go B. is going C. goes D. going 37. Her brother ____ in Canada at present. A. working B. works C. is working D. work 38. I ____ to the same barber since last year. A. am going B. have been going C. go D. had gone 39. Her father ____ when she was a small girl. A. dies B. died C. has died D. had died 40. Last week, my professor promised that he ______ today. A. would come B. will come C. comes D. coming