Cho góc nhọn $xAy$ . Các điểm $B,C$ lần lượt di động trên các tia $AB, AC$ sao cho: $AB+AC=6cm$ Xác định vị trí $B,C$ để diện tích tam giác $ABC$ đạt giá trị lớn nhất

I. Choose A,B,C or to complete sentences. Câu 31: ………………., Tom arrived late A. Although of having taken a taxi B. Though having taken a taxi C. In spite of having taken a taxi D. Despite of having taken a taxi Câu 32: It took ………………. A. I one hour to go to work by bicycle B. me one hour going to work by bicycle C. my hour to go to work by bicycle D. me one hour to go to work by bicycle Câu 33: It is time ……………….. A. for the children go to bed B. for the children to going to bed C. for the children to go to bed D. the children to go to bed Câu 34: ………………., he’ll lose his job. A. Unless he works harder B. If he works harder C. Unless he doesn’t work harder D. If he doesn’t works harder Câu 35: It is two months ………………. A. since it last rained B. since it has rained C. since it was last rained D. since last it rained II. Choose the best one (A, B, c or D) that is correctly written from the words and phrases given. Câu 36: Robots / clean / our houses / 2100. A. Robots will cleaning our houses in 2100. B. Robots will cleaned our houses in 2100. C. Robots will clean our houses in 2100. D. Robots will clean our houses by 2100. Câu 37. What time / Name / leave / home / yesterday? A. What time do Name leave home yesterday? B. What time does Name leave home yesterday? C. What time did Name leaving home yesterday? D. What time did Name leave home yesterday? Câu 38. She/ hope/ have/ her/ own/ book/ future. A. She hopes she will has her own book in the future. B. She hopes she will have her own book in the future. C. She hope she will have her own book in the future. D. She hopes she will has her own book in a future. Câu 39. She/ sometimes/ library/ borrow/ books. A. She sometimes go to library to borrrow books. B. She sometimes goes to library to borrow books. C. She is sometimes go to library to borrow books. D. She goes to sometimes library to borrow books. Câu 40. She/ think/ read books/ interesting/ useful. A. She think reading books is interesting and useful. B. She think read books is interesting and useful. C. She thinks reading books is interesting and useful. D. She think reads books is interesting and useful.

- Trong thực tế các em đã gặp rất nhiều trường hợp sinh đôi, sinh ba, thậm trí trên thế giới có những trường hợp sinh 7 hay nhiều hơn thế nữa. Em có thể giải thích các trường hợp sinh đôi, sinh ba này như thế nào?

Cho tam giác ABC vuông cân tại A. Trọng tâm G(3,6,1). Trung điểm BC là M(4,8,-1). BC nằm trong mặt phẳng P có phương trình: 2x+y+2z-14=0. Tìm tọa độ A,B,C

I. Read the following passage, then choose the correct answer . I was born in Newcastle, a city in the North East of England. Newcastle is on the bank of the River Tyne. It is quite big, with a population of about 200,000 people. There is a cathedral and a university. There are five bridges over the Rive Tyne, which link Newcastle to the next town, Gateshead, where there is one of the biggest shopping centres in the world. A few years ago, the main industries were shipbuilding and coalmining, but now the chemical and soap industries are important. I moved to London ten years ago but I often return to Newcastle. I miss the people, who are very friendly, and I miss the beautiful countryside near the city, where there are so many hills and streams. Câu 21: The word ‘’ which’’ in the text refers to ……………………… A. Newcastle B. five bridges C. Gateshead D. River Tyne Câu 22: Newcastle is ……………………… A. a small town in England B. a city near the North East of England C. a city in the North of England D. a city in the North East of England Câu 23: According to the passage, the writer ……………………… A. has come back to live in Newcastle B. doesn’t live in Newcastle any more C. is still living in Newcastle D. has never returned to Newcastle Câu 24: The population of Newcastle is ……………………… A. 200,000 people B. much less than 200,000 people C. much more than 200,000 people D. about 200,000 people Câu 25: Gateshead has one of ……………………… in the world. A. the largest rivers B. the most important shipbuilding industries C. the most beautiful countrysides D. the biggest shopping centres I. Read the following passage, then choose the correct answer . The traffice light signal was invented by a railway signaling engineer. It was installed outside The House of Parliament in 1868. It __<16>__ like any railway signal of the time,and was operated by gas . __<17>__, it exploded and killed a policeman, and the accident discouraged further development until cars became common.Modern traffic lights are an American invention. Red-green___<18>__ were installed inCleveland in 1914. Three- color signals, operated by hand from a tower in the __<19>__ of the street, were installed in New York in 1918 . The first lights of this type to __<20>___in Britain were in London, on the junction between St James’s street and Piccadilly in 1925. Câu 26: A. looked B. resembled C. showed D. seemed Câu 27: A. Therefore B. Despite C. Although D. However Câu 28: A. methods B. ways C. means D. systems Câu 29: A. middle B. focus C. halfway D. heart Câu 30: A. become B. appear C. show D. happen

nghành kinh tế phát triển nhờ vào yếu tố tự nhiên và tích cực bảo vệ môi trường

Câu 1: This time in 2050, many countries .............. nuclear power. A. are using B. are going to use C. will be used D. will be using Câu 2: Which of the following is NOT non-renewable source of energy? A. natural gas B. wind C. oil D. coal Câu 3: Duong: “My first English test was not as good as I expected.” - Thomas: “.............” A. It’s ok, don’t worry. B. Good Heavens! C. That’s brilliant enough! D. Never mind, better job next time. Câu 4: She is really .............. with how this drama ended. A. annoy B. annoyed C. annoying D. annoyance Câu 5: The students used ……… to school five years ago. A. cycled B. to cycle C. will cycle D. cycling Câu 6: ……………. the film was interesting, I slept from beginning to end. A. Despite B. Although C. In spite of D. However Câu 7: My best friend …………….eating fast food because it’s not good for her health. A. loves B. likes C. enjoys D. hates Câu 8: These books are mine. They are not ……………. A. her B. she C. hers D. hers pens Mark the letter A, B, C or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation. A, B, C, or D. Câu 9: A. perform B. end C. telephone D. festival Câu 10: A. visited B. liked C. suggested D. wanted Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to complete the following question. Câu 11: In some countries, …………………. uniforms is compulsory in schools. A. wearing B. to wear C. wore D. wear Câu 12: He drinks …………………. water every day. A. a lot of B. many C. fewer D. a few Câu 13: She studies well …………………. she is busy A. and B. although C. because of D. because Câu 14: Choose the word whose underlined part is pronounced differently from the others A. your B. sound C. pround D. house Câu 15: My sister has long hair, but …………………. is short. A. my B. her C. mine D. I Câu 16: He didn’t say anything, ………………….? A. did he B. didn’t he C. he did D. he didn’t Câu 17: The room ………………….recently so you need to do tidy it now. A. have cleaned B. hasn’t been cleaned C. haven’t been cleaned D. has been cleaned Câu 18: I would like ………………….coffee in the morning A. drink B. dinking C. to drink D. drank Câu 19: Thank you very much for that! Well, …………………. A. I don’t mind B. thanks C. you’re welcome D. of course Câu 20: ’’ Those eggs of different colors are very artistic.’’ ‘’ Yes, they …………………. in Russia’’ A. were painted B. painted C. were paint D. were paiting

Bạn Dũng trung bình tiêu thụ 15 ca-lo mỗi phút khi bơi đi bộ 10 ca- lo khi đi bộ . Hôm nay dũng mất 1,5 giờ cho hai hoạt động trên và tiêu thụ 1200 ca-lo . Hỏi hôm nay bạn Dũng mất bao nhiêu thời gian cho mõi hoạt động ?

Trong viec phát triên các nc nam âu là j

RG biểu thức A giúp mk vs ạ #mk lm r mà thấy nó cứ sai nên lên đây nhờ mn