Hai lớp 8A và 8B cùng nhau trồng hoa trong vườn trường sau 24 giờ thì hoàn thành công việc. Nếu cả hai lớp làm trong 10 giờ rồi lớp 8A nghỉ để lớp 8B làm tiếp một mình trong 35 giờ thì cả hai lớp hoàn thành công việc. Tính thời gian mỗi lớp làm riêng để hoàn thành công việc. P/s : Các bạn giúp mik với ạ :33 Mik đg cần gấp

rewrite sentences using the provided word keep meaning as that of the root one 1 . Let's play chess What ................................................................................................? (playing)

Khối lượng của 0,5 mol phân tử H2 O là

1 bếp điện có ghi 220V-1000W được sử dụng với hiệu điện thế 220V để đun sôi 2,5 lít nước ở nhiệt độ bạn đầu là 20°C thì mất 1 thời gian 14p 35 giây 1/ tính hiệu suất của bếp. Biết nhiệt dung riêng của nước là 4200J/kg.K. 2/ mỗi ngày đun sôi 5 lít nước ở điều kiện như trên thì trông 30 ngày sẽ phải trả bao nhiêu tiền điện cho việc đun nước này. Cho biết giá 1kWh điện là 800 đồng

a)Tìm các ước của 11 b)Tìm bốn bội của -5

Tính hiệu ,biết số bị trừ là số lớn nhất có hai chữ số và số trừ là 90

Đốt cháy hoàn toàn 2g canxi trong không khí. a. Tính thể tích khí oxi cần dùng đktc b. Tính khối lượng kali clorat cần dùng để điều chế được lượng khí oxi dùng cho phản ứng trên. Biết hiệu suất của phản ứng đạt 90%.

Số nguyên tử sắt có trong 280 gam sắt là

Question : 26. Hello, Bing. This is Erik and this is Will. ………… are doctors. A. he B. she C. they D. me Question : 27. Will your parents be ___________ with your school results? A. relaxed B. joined C. satisfied D. detested Question : 28. Most of my friends are ___________ reporters. A. newspapers B. newspaper C. newspaper’s D. newspapers’ Question : 29. My friend, Marie ___________ blonde curly hair. A. have B. has C. having D. had Question : 30. Her neighbor looks ___________ his mother a lot. A. like B. as C. for D. same Choose the letter A, B, C or D to complete the passage below Johnson __________ (6) a student. He’s 12 years old. He studies at Ba Dinh secondary school on Hoang Hoa Tham Street. He usually __________ (7) home for school at 6.30 a.m. He lives quite near the school, _________ (8) he usually walks to school with some of his friends. But today his father ___________ (9) him to school. He loves Literature and English. Today he has Physics, Chemistry and English. __________ (10) school, he often plays volleyball in the school field. Question : 36. A. is        B. are        C. am        D. be Question : 37. A. left        B. leave        C. is leaving        D. leaves Question : 38. A. yet        B. for        C. so        D. but Question : 39. A. is driving        B. drive C. drives        D. driving Question : 40. A. Before        B. After C. During        D. When Choose the letter A, B, C or D to complete the sentences with given words Question : 46. All / subjects / my/ new/ school/ interesting. A. All subjects at my new school is interesting. B. All subjects my new school has interesting. C. All subjects of my new school interesting. D. All subjects at my new school are interesting. Question : 47. Hoa/ bike/ school/ every day. A. Hoa goes her bike to school every day. B. Hoa rides her bike to school every day. C. Hoa drives her bike to school every day. D. Hoa rode her bike every day. Question : 48. Mrs. Smith/ travel to work/ motorbike/ every day. A. Mrs. Smith traveling to work on motorbike yesterday. B. Mrs. Smith travels to work by motorbike yesterday. C. Mrs. Smith travel to working in motorbike yesterday. D. Mrs. Smith traveled to work by motorbike yesterday. Question : 49. Summer, / I/ often/ spend/ time/ play/ bingo/ my/ best/ friends. A. In the summer, I often spend my time playing bingo with my best friends. B. On the summer/ I often spend my time to play bingo for my best friend. C. At summer, I often spend my time play bingo with my best friend. D. In the summer, I often spend my time to play bingo with my best friends. Question : 50. How much/ time/ day/ you/ spend/ playing game? A. How much time a day do you spend on playing game? B. How much time a day do you spend in playing game? C. How much time a day did you spend in playing game? D. How much time a day did you spend on playing game?

Combine two sentences into a new one using the given words in brackets. Do not change the given words in any ways. Question 37: The man is my new boss. He is talking to the lady over there. (Who) => Question 38: “Does Mr. Pike live here?” the postman asked the boy. (If) => Question 39: If he doesn’t work harder, he’ll lose his job. (Unless) => Question 40: Though he lives in England, he can’t speak English well. (In)