Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions. Question 16: This group of chemicals is known to be harmful to people’s health. A: safe B: dangerous C: natural D: Risky Explain

Choose the correct sentence made from the given words. Question 25. English/official language/countries/like/India,/Malaysia,/Singapore/. A: English is official language in countries like India, Malaysia and Singapore. B: English is an official language in countries like India, Malaysia and Singapore. C: English is an official language in countries like as India, Malaysia and Singapore. D: English is a official language in countries like India, Malaysia and Singapore. Explain

Cho dạng đúng của tính từ trong ngoặc A, Nam together with his friends, hardly (1-get) ........bad marks B, I’m going to the bookshop(2-buy) ......some books c, The number of participants(3- increase) .......every week d, I am very tired, I can’t wait(4- get)......home . As soon as I get home , I(5-take) ........a hot shower and (6-go) .......... to bed e, A new school (7-build) ........behind our school recently f, A little girl can’t spend all her time (8-listen) .......to stories g, Duy (9- not visit ) ........the museum with his class last Sunday beacause he (10- catch) ...... a cold B2: mỗi câu có một lỗi sai. Tìm và sửa lại 1. Let’s getting some of these vegetables 2. Many people prefer watching TV than reading books 3. Staying at home all day sounds boringly to me 4. I’d like to go out and playing with my friends 5. It spend 2 hours to go from Thaibinh to HaNoi 6. We usually help our mother about the housework in our free time 7. Marie is the most beautiful of the two girls 8.He was absent for work because of illness 9. Thanks for invite me to the rice-cooking festival of your village 10. I’d rather to participate in he contest than Watch it B3:cho dạng đúng của từ trong ngoặc 1. Hoi An is .....for its ancient houses (fame) 2. Water has no colour. It is a........liquid (colour) 3. Life today is........From life 50 years old (differ) 4. He has been a active ........in the contest(contest) 5. Santa Claus is based on the ..........of Saint Nicholas in a poem(describe) 6. Over 200 .......entered the race( compete) 7. My father has a........computer . He often brings it with him when he’s away on business(port) . I took the medicine , and the headache ........(appear) 9. We must’t be ....... when we cross busy streets ( care) 10. Why don’t we go ......in the moutain next Sunday? (Picnic) B3: hoàn thành câu dựa vào gợi ý 1. Nga/ used/ sưim/ this river/ but/I /not/anymore 2.If/I/be/you/I/not buy/ that/ bicycle 3. It/ difficult / prevent/ people / park here B4/ Viết lại câu sao cho nghĩa ko đổi 1. She knows a lot more about it than I do => i don’t know.................

Choose the word whose underlined part is pronounced differently from the others. A: trainee B: coffee C: payee D: trustee Explain

1. Không có cây xanh thì không có sự sống trên Trái Đất, điều đó đúng không? Vì sao? 2. Vì sao thực vật hạt kín có thể phát triển đa dạng, phong phú như ngày nay? 3. Có các dụng cụ thí nghiệm gồm( 1 cốc thủy tinh lớn, 1 cây trồng trong cốc nhỏ, 1 hộp quẹt diêm, 1 tấm kính và 1 túi bóng đen). Hãy trình bày cách thiết kế thí nghiệm và thử kết quả như thế nào để biết khi không có ánh sáng cây lấy khí oxi của không khí.

What young VietNamese students should do to reduce the carbon footprint of their homess, schools, communities and country .. Làm giúp mình đề này.. Khoảng 1 mặt giấy trở lại ạ ngắn gọn thôi Thanks

Các bạn giải hộ mik vs ạ mik dag cần gắp

Câu 1. “Hệ thần kinh sinh dưỡng điều hòa hoạt động không ý thức trong cơ thể”. Hãy dẫn ra tối thiểu 1 ví dụ để minh họa cho phát biểu trên? Câu 2. Hai phân hệ giao cảm và đối giao cảm hoạt động như thế nào? Điều đó có ý nghĩa gì đối với đời sống? Câu 3. Dây thần kinh thị giác là dây số mấy và nằm ở vùng nào? Câu 4. Mắt ta nhìn vật rõ nhất khi ảnh của vật rơi vào điểm nào của cầu mắt? Vì sao? Các bạn giải giúp mình nhé. Lưu ý là ko có trên mạng đâu

Put the verbs in brackets into the correct form: 1. If I (know)…………………………. that you were ill, I (go)……………………… to see you. 2. If she'd had enough money, She (buy) …………………………… a car. 3. I (buy) ……………………………………….. a car If you lend me some money. 4. I (see) …………………………… him if I (go) …………………………. to the party last night. 5. We could have gone out if the weather (not be)……………………………………… so bad. 6. If the book (not be )…………………………… expensive, I'll buy it. 7. You would be very surprised if he (return)……………………………… 8. I'll go out if it (not rain)………………………………. 9. They wouldn't come to the party if you (not invite) …………………………………..them 10. What ……………………………… you (do) ……………………. if you (be) ………………….. him? 11. If that hat costs much, I (buy) ……………………………. a small one. 12. If you (drive) ……………………...more carefully, you (have) ………………………… so many accidents. 13. If I (make) …………………………….. that mistake again, my teacher (get) ……………………… angry with me. 14. If I spoke English, my job (be) …………………………….. a lot easier. 15. If he (go) ……………………………….. to London yesterday, he ( meet) ………………………………. his old friend. 16. I will lend them some money if they (ask) …………………………….. me. 17. If we had known who he was, we (invite) ………………………….. him to speak at our meeting. 18. My dog (bark) …………………………… if it (hear) ………………………….. any strange sound. 19. If I (have) ………………………….. enough money, I would buy a house. 20. They (not/let) …………………………… you in if you (come) late. 21. If you (not go) ……………………………….. away, I (send) ……………………………… for a policeman. 22. If I (be) ………………………………… in your place, I (accept) …………………… Mr. Anderson’s invitation. 23. If I (win) ……………………………. a big prize in a lottery, I’d give up my job. 24. If I (be) ……………………………….. you, I (tell) …………………………… the truth. 25. I was busy. If I (have) …………………………..free time. I (go) ……………………………. to the cinema with you. 26. Why didn’t you attend the meeting? Oh, I did not know. If I (know)……………………… I (come) ……………………..there. 27. What ……………….we(do)……………………… if they do not come tomorrow? 28. If I had enough time now, I (write) ………………………………. to my parents. 29. It’s too bad Helen isn’t here. If she (be) ………………………….. here, she (know) …………………..what to do. 30. If I (eat) …………………………… breakfast tomorrow morning, I (get) …………………………. hungry during class. 31. If she (come) ……………………………….. late again, she (lose) ……………………………her job. 32. I (let) ……………………………. you know if I (find) ……………………………………. out what’s happening. 33. If we (live) ………………………………. in a town, life would be better. 34. I’m sure he wouldn’t mind if we (arrive) ……………………………. early. 35. We (phone) ……………………………………. you if we have time. 36. If I won the lottery, I (give) ………………………………. you half the money. 37. It (be) …………………………………….. a pity if she married Fred 38. If I’m free on Saturday, I (go) ………………………….. to the mountains. 39. She (have) …………………………….. a nervous breakdown if she goes on like this. 40. I know I (feel) better if I (stop) …………………… smoking. 41. If I (be) …………………… you, I (help) ………………………… him. 42. I (understand)…………………………………….. him if he (speak) …………………………….. more slowly. 43. He didn’t listen to the teacher. If he (listen) ………………………….. carefully, he (perform) …………………… well in the examination 44. He’s waiting for his mother to come back from Chicago. If his mother (come) …………………………. home, he (have) ……………………………………. a lot of presents. 45. He wanted to buy some Christmas presents but he couldn’t. If he (afford) …………………………….. to buy, his children (be) ……………………………. very happy to greet a new year. 46. The kitchen will look better if we (have) ………………………………….. red curtains. 47. If I knew his address, I (go) ……………………….. round and see him. 48. If you (not be) ……………………. so busy, I (show) ………………………… you how to play. 49. It (be) ………………………………… quicker if you (use) a computer. 50. If we (have) ………………………………….. some eggs, I (make) ………………………………… you a cake. 51. Bring him another if he (not/like) ……………………………….. this one. 52. She (be) …………………………. angry if she (hear) …………………………. this tomorrow. 53. Unless you are more careful, you (have) …………………………….. an accident. 54. If you (like), I (get) …………………………………. you a job in this company. 55. If grandmother (be) ……………………….. 5 years younger, she (play) ………………………… some games. 56. If he sun (stop) …………………………… shinning, there (be) ………………………………………… no light on earth. 57. If I (be) ………………………………… a millionaire, I (live) ……………………. on Mars.

Hòa tan 36,1 g hỗn hợp Al và Fe vào 1500ml dung dịch H2SO4 2M thu được dung dịch X. Thêm 800 g dung dịch KOH 43,75% vào dung dịch X, lọc lấy kết tủa rửa sạch và nung nóng đến khối lượng không đổi thu được 40 g chất rắn Tính khối lượng mỗi kim loại ban đầu