Câu 1. Last year my son was lost among the crowd when we have gone shopping. A B C D Câu 2. The problem has turned out to be more serious than we will have thought. A B C D Câu 3. Almost 300 million people had visited America’s national parks every year. A B C D Câu 4. They have studied English before they went to London. A B C D Câu 5. They has got married for 30 years by the end of this month. A B C D Câu 6. They will help you whenever you will ask them. A B C D Câu 7. When Sam will arrive, he will open the gift. A B C D Câu 8. My father has ever told me honesty was the best policy. A B C D Câu 9. Did you say that you will have a lot of things to do the following week? A B C D Câu 10. When we arrived at the station, the train has already left. A B C D Câu 11. Did your doctor recommend you that you will stop smoking? A B C D Câu 12. Up to now, there had been no woman being chosen the US president. A B C D Câu 13. The neighbors are having a party. They are making so much noise since 6 o’clock. I can’t sleep. A B C D Câu 14. Don’t leave the house until I will get back. A B C D Câu 15. I was walking along the pavement when I realized that there has been a man following me. A B C D Câu 16. Human had struggled against weeds since the beginning of agriculture. A B C D Câu 17. Mary said that she do jogging every morning. A B C D Câu 18. At this time next week, Peter was working in London. A B C D Câu 19. Never I have seen such a good film before. A B C D Câu 20. Before the 1920s, no women will vote in the US. A B C D Câu 21. Some students have always complain that they do not have enough money to spend. A B C D Câu 22. The teacher got angry with him because he sometimes come to class late. A B C D Câu 23. The mother had always took good care of her little son. A B C D Câu 24. An American woman not always shake hands when she is introduced to a man. A B C D Câu 25. Peter has been written the composition for 3 hours and he has not finished yet. A B C D Câu 26. We were a few minute late so the film was already started when we got to the cinema. A B C D Câu 27. By the time the police come, the robber had run away. A B C D Câu 28. Why didn’t Peter go to school? What did happened to him? A B C D Câu 29. I was listening to the radio when the door bell will ring. A B C D Câu 30. I have learnt English for I was ten years old. A B C D

tìm max, min( tìm giá trị lớn nhất, giá trị nhỏ nhất) a, A= 4x - x^2 + 3 b, B= x^2 - 6x + 11 c, C= x^2 - 4x + y - 8y + 6 d, D= x^2 - 8x + 19 e, E= - x^2 + 2x - 7 cảm ơn nha

Giúp mình với ạ mình đang cần gấp Cho b gam este B tác dụng với 2,64g NaOH thu được hỗn hợp sản phẩm Ag C. Cô cạn A được 5,224g chất rắn. Sản phẩm C tham gia tráng bạc được 13,392g Ag. Tìm CTCT của B và tính b

một mảnh đất hình thang có đáy lớn 35m , đấy bé bằng 4/5 đấy lớn . chiều cao là 24m . người ta để 20% diện tích để đào ao , còn lại để trồng cây . tính diện tích đất để trồng cây 10. 15 - 15/7 - 15/12 - 15/98 18 - 18/7 - 18/12 - 18/98

Xác định số tự nhiên khi biết tổng. a) 7 000 000 + 600 000 + 4 000 + 100 +3 b) 8 000 000 000 + 30 000 000 + 7 000 000 + 400 000 + 20 000 + 300 + 1 thanks

Phân tích đa thức thành nhân tử: ( Sử dụng pp6: làm xuất hiện nhân tử ( a+b ), ( b+c ), ( c+a) hoặc ( a-b ), ( b-c ), ( c-a) hoặc ( a + b + c ) $(a - b)^{3}$ + $(b - c)^{3}$ + $(c - a)^{3}$

viết 1 đoạn văn khoảng 10 câu tả một bạn đang chơi bóng đá

Describe a museum or exhibition that you particularly enjoyed visiting. You should say: where the museum or exhibition is/was who you went with what you saw there and explain why you enjoyed visiting this museum or exhibition.

Cho 13,5 gam hỗn hợp Cl2 và Br2 có tỉ lệ mol 5:2 vào dung dịch chứa 36 gam NaI. Cô cạn dung dịch sau khi phản ứng kết thúc, thu được m gam chất rắn. Giá trị của m là ?

m.n ai hiểu rõ phần vecto giải thích lý thuyết cơ bản chi tiết giùm em vs ạ .