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Cho tam giác ABC cân tại A (góc A khác 90 độ). Vẽ trung tuyến AM (M thuộc BC) và MH vuông góc với AB,MK vuông với AC, các đường thẳng MK và AB cắt nhau tại E, các đường thẳng MH và AC cắt nhau tại F a) Chứng minh tam giác AMH = tam giác AMK b) Chứng minh tam giác AEF cân c) Vẽ trung tuyến BN của tam giác ABC sao cho AC=5 cm BC=8 cm.Tính BN d) Tìm trực tâm của tam giác AME

Cho tam giác ABC cân tại A (góc A khác 90 độ). Vẽ trung tuyến AM (M thuộc BC) và MH vuông góc với AB,MK vuông với AC, các đường thẳng MK và AB cắt nhau tại E, các đường thẳng MH và AC cắt nhau tại F a) Chứng minh tam giác AMH = tam giác AMK b) Chứng minh tam giác AEF cân c) Vẽ trung tuyến BN của tam giác ABC sao cho AC=5 cm BC=8 cm.Tính BN d) Tìm trực tâm của tam giác AME

BÀI TẬP : Rewrite, using : SO THAT/IN ORDER TO / ( NOT TO ) (Viêt lại câu theo 2 cách. Sử dụng SO THAT và IN ORDER TO ( NOT TO) 1) The boys stood on the desks . They wanted to get a better view. (………………………………………………………………………………………… 2) We learn English. We want to have better communication with other people. (………………………………………………………………………………………… 3) We lower the volume . We don't want to bother our neighbours. (…………………………………………………………………………………………… 4) I will write to you. I want you to know my decision soon. (………………………………………………………………………………………….. 5) these girls were talking whispers. They didn't want anyone to hear their conversation. (…………………………………………………………………………………………… 6) The little girl feigned to be sick. She hoped We didn't make her work. (…………………………………………………………………………………………… 7) I spoke loudly. I wanted everybody could hear me clearly. (…………………………………………………………………………………………… 8) Mary often goes home as soon as the class is over. She doesn't want her mother to wait for her. (……………………………………………………………………………………………9) Tom gets up early. He doesn't want to be late for school. (…………………………………………………………………………………………… 10) Wellfrog hid the sweets under his pillow .He didn't want his mother to see them. (…………………………………………………………………………………………… 11/ I’m studying hard. I want to keep pace with my classmates. ……………………………………………………………………………………………… 12/ Alice prepares her lessons carefully. She wants to get high marks in class. ……………………………………………………………………………………………… 13/ Please shut the door. I don’t want the dog to go out of the house. ……………………………………………………………………………………………… 14/ I wish to have enough money. I want to buy a new house. ……………………………………………………………………………………………… 15/ You should walk slowly . Your sister can follow you. ……………………………………………………………………………………………… 16/ They did their job well. They hoped the boss would increase their salary. ……………………………………………………………………………………………… 17/ We turned on the lights. We didn’t want to waste electricity …………………………………………………………………………………………… 18/ We lower the volume of the radio. We don’t want to bother our neighbours. ……………………………………………………………………………………………… 19/ The robber changed his address all the time. He didn’t want the police to find him. ……………………………………………………………………………………………… 20/ The man spoke loudly. He wanted every body to hear him clearly. ……………………………………………………………………………………………

Cho đề văn sau: Bác Hồ từng khẳng định: "Đoàn kết đoàn kết đại đoàn kết Thành công thành công đại thành công" Dựa vào thực tế lịch sử của dân tộc ta chứng minh nội dung câu nói trên a) Tìm các luận điểm chính và sắp xếp chúng theo một trình tự b) lập dàn ý hoàn chỉnh và viết thành văn phần mở bài ,kết bài

Put the verbs in the correct tenses

1.      If we (pollute) ................................ the water, we will have no water to use.

2.      If we cut down trees in the forest, there (be)........................  big flood every year.

3.      If he (not pass) .......................... the driving test, we(be) ...................................disappointed.

4.      I (not write) ............................ to you if you (not send) ............................... me your address.

5.      The sea (get) ......................... warmer if the earth (get) ................................warmer.

6.      If we (not protect) .............................. the animals, they (kill)...........................

7.      If Jane (not apologize) ........................... to us, we (not speak) ................................... to her.

8.      If people (stop) ................................ using dynamite for fishing, a lot of sea creatures ( be) ................................ well preserved.

9.      If he (study) ................................. hard, he could not fail the exam.

10.What …………. you ……….. if you ………….. in my position? (do/be)

11. We will go for a picnic if the weather (be) ................................ fine tomorrow.

12. If I were you,  I (travel) ....................................  around the world .

13. If there were flying saucers, there  (be) ...................................  traces of their landing.

14. Unless it (rain)....................................... , they  will go shopping.

15. I would take photos of UFOs if I (see) .......................................... them

Hoàn thành các câu sau với các các từ ở trong ngoặc câu điều kiện loại 1 2 3
1. If we meet at 9:30, we...................................(have) plenty of time.
2. Lisa would find the milk if she...................................(look) in the fridge.
3. The zookeeper would have punished her with a fine if she.....................(feed) the animals.
4. If you spoke louder, your classmates...................................(understand) you.
5. Dan.......................................(arrive) safe if he drove slowly.
6. You......................................(have) no trouble at school if you had done your homework.
7. If you....................................(to swim) in this lake, you'll shiver from cold.
8. The door will unlock if you...................................(press) the green button.
9. If Mel......................................(ask) her teacher, he'd have answered her questions.
10. I.................................(call) the office if I was/were you.

11.  If the earth suddenly (stop) …………. spinning we all (fly) …………. off it.

12.  If you (smoke) ……… in a non-smoking compartment the other passengers (object) ………

13.  If we (have) …………….. a submarine now, we (use) …………it to investigate the seabed

14.  Were he ten years younger, he (take) …………….. part in the voyage around the world

15.  Should you come late, they (not let) ……………… you in

16.  He might get rid of his cough if he (not smoke) ……………so much

17.  If someone (give) …………….you a boat what you (do) …………… ?

18.  Water (freeze) ……………. if the temperature falls below zero

19.  I (warn) ………….. you if I had seen you last week

20.  I wouldn’t have been so upset if Judy (write) ……………… to me earlier

21.  Shout if you (see) …………..anything unusually

22. The engine starts if you (turn) ……………..this key

23. What (you / say) ………………….if I offered you a job?

24.  If it (not be) _____________ for you, I would be late

25.  Were I to become president, my first act (be) __________ to help the poor

26.  If he (listen) _____________ to his father’s advice, he would still be working here.

27.  If she hadn’t stayed up late last night, she (not / be) ____________ tired now.

28.  I feel as if my head (be) ___________ on fire now, doctor.

29.  Had I known her address, I (go) _____________ to visit her.

30.  He looked frightened as if he (see) _____________ a ghost.

31.  I wish I (see) ____________ her off at the airport yesterday.

32. Tom wishes he (have) _________ enough money to buy a new car now.

33.  Mary wishes she (become) _________ an astronaut someday.

34.  He wishes he (have) __________ a day off to visit his parents. He hasn’t seen them for ages

35.  He wishes he (not/buy) ______________ that old car.

EX1: Hoàn thành các câu sau với các các từ ở trong ngoặc câu điều kiện loại 1 2 3 1. If we meet at 9:30, we....................................(have) plenty of time. 2. Lisa would find the milk if she...................................(look) in the fridge. 3. The zookeeper would have punished her with a fine if she.....................(feed) the animals. 4. If you spoke louder, your classmates...................................(understand) you. 5. Dan.......................................(arrive) safe if he drove slowly. 6. You......................................(have) no trouble at school if you had done your homework. 7. If you....................................(to swim) in this lake, you'll shiver from cold. 8. The door will unlock if you...................................(press) the green button. 9. If Mel......................................(ask) her teacher, he'd have answered her questions. 10. I.................................(call) the office if I was/were you. 11.If the earth suddenly (stop) . spinning we all (fly) . off it. 12.If you (smoke) in a non-smoking compartment the other passengers (object) 13.If we (have) .. a submarine now, we (use) it to investigate the seabed 14. Were he ten years younger, he (take) .. part in the voyage around the world 15. Should you come late, they (not let) you in 16. He might get rid of his cough if he (not smoke) so much 17. If someone (give) .you a boat what you (do) ? 18. Water (freeze) . if the temperature falls below zero 19. I (warn) .. you if I had seen you last week 20. I wouldnt have been so upset if Judy (write) to me earlier 21. Shout if you (see) ..anything unusually 22.The engine starts if you (turn) ..t.his key 23.What (you / say) .if I offered you a job? 24.If it (not be) _____________ for you, I would be late 25. Were I to become president, my first act (be) __________ to help the poor 26. If he (listen) _____________ to his fathers advice, he would still be working here. 27. If she hadnt stayed up late last night, she (not / be) ____________ tired now. 28. I feel as if my head (be) ___________ on fire now, doctor. 29.Had I known her address, I (go) _____________ to visit her. 30. He looked frightened as if he (see) _____________ a ghost. 31. I wish I (see) ____________ her off at the airport yesterday. 32.Tom wishes he (have) _________ enough money to buy a new car now. 33.Mary wishes she (become) _________ an astronaut someday. 34. He wishes he (have) __________ a day off to visit his parents. He hasnt seen them for ages 35.He wishes he (not/buy) ______________ that old car.