Để nhớ bài lâu, em phải học tập như thế nào? Giải thích cơ sở khoa học của phương pháp học tập đó? Giải chi tiết hộ em, chủ yếu là phần giải thích cơ sở

II. Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the 1. While I walk past the park, I saw some childrenplay football. 2. After John eats dinner, he wrote several letters and went to bed. 3. What did you do at 9 o'clock last night? I phoned you but nobody answered. 4. By the time I arrivedat the station, the train has already left. 5. Ann and Susan have knowneach otherduring they were at school. 6. She has disappeared three days ago, and they are still looking for her now. 7. After Mrs. Wang had returnedto her housefrom work, she was cooking dinner 8. It’s the first time I sawthis film 9. After he graduatesfrom university, he joined the army. 10. Up to now, there had beenno woman being chosen the US president. 11. After Mrs. Wang had returnedto her housefrom work, she was cooking dinner. 12. Jimmy threw the ball high in the air, and Betty catching it when it came down. 13. Linda has worn her new yellow dress only once since she buys it. 14. Last week Mark told me that he got very bored with his present job and is looking for a new one. 15. Having fed the dog, he was sat down to his own meal. 16. When I turned on my computer, I was shockedto find some junk mail, and I justdelete it all. 17. The boss laughed when the secretary has told him that she reallyneeded a pay rise. 18. Debbie, whose father is an excellent tennis player, has been playing tennis since ten years. 19. I have seenlots of interesting places when I went on holiday last summer. 20. When my cat heard a noise in the bushes, she stopped moving and listenintently.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions. 15. Almost half of turtles and tortoises are known to be threatened with A. extinct B. extinction C. extinctive D. extinctly is the natural environment in which a plant or animal 16. lives. A. Habitat Breeding B. Reserve C. D. research 17. Panda is one of the species which are currently of extinction danger A. on B. in C of D. with is the existence of a wide variety of plant and animal 18. species living in their natural environment. A. Biodiversity B. Conservation C. Urbanization D. Destruction It isn't 19. “Do you have to buy this hat" --“ No, I necessary." A. mustn't B. don't need C. needn't D. won't 20. You A. need _keep it secret or they’ll kill you. C. may B. can D. must

Giải giúp mk bài này với ak thank ak

Tại sao đường sức từ của dòng điện thẳng là các hình tròn đồng tâm

Một chiếc hộp bằng miếng bìa hình chữ nhật có chiều rộng và dài lần lượt là 70 cm và 150 cm được cắt ra bằng các hình vuông bằng nhau và dựng thành một chiếc hộp. (chiếc hộp không có nắp). Thể tích lớn nhất của chiếc hộp là bao nhiêu? Mn giúp em câu này với ạ em cảm ơn nhiều ạ

Cho tg ABC cân tại B, biết góc A= 40độ. Tính các góc B và góc C

Exercise2. Circle the best answer A, B, C or D to complete the sentences 1. Nga broke the glass and her mom is very angry A. She broke the glass B. she is breaking the glass C. She has just broke the glass D. She breaks the glass 2. Mr Long began to work in this company 10 years ago A. He is worling in this company B. He has worked in this company for 10 years C. He works in this company D. He will work in this company next year 3. I am very hungry now A, I have not eaten anything yet B. I do not eat anything C. I did not eat anything D. I will not eat anything 4. Nhunf: Would you like to see the film" Gone with the wind"? Hang: Thank you. I saw it last week A. Hang is seeing the film B. Hang was seeing the film C. Hang will see the film next week D. Hang has already seen the film 5. They hane gor married since 2008 A. When they get married B. How long have they got married C. How long did they ger married D. Whrn will they get married

Tổng S = -2+4-8+16 -32+64-...+(-2)^n-1 +(-2)^n với n>1 n€ N*

Làm hộ mk vs đang cần gấp chắc dễ mak!!!