Nhanh nha mn ai nhanh ch hay nhất

Vẽ đậu mầm ôm ngực trái (kiểu đau tim í) NL: toy giống cái đề rồi TvT Đau lòng :<

260. Dick ………..(start) school before he ………. (be) seven. 261. You …………. (feel) better after you have something to eat. 262. Susan ……….. (play) chess when she was a child. 263. Our teacher ……….. (tell) us yesterday that he ……….. (visit) England in 1970. 264. He felt asleep while he ………… (do) his homework. 265. You ………… (not know) the value of health until you ………. (lose) it. 266. Our friends asked us why we ………… (come) there so early. 267. While I was writing a letter, the children ………... (play) outside. 268. We ………… (not receive) any letter from him since he………….. (leave) 4 months ago. 269. After my sister ………… (wash) her clothes she began to study. 270. We had hardly begun our walk when it ………. (begin) to rain. 271. They …….. (come) with us as soon as thy finish work. 272. My grandmother ………. (die) after she………. (be) ill a long time. 273. How long you ……………(study) in this school? 274. I ……… (study) here for 2 years. When I ……… (finish) the 5th year, I …………(be) able to get a diploma.

Dùng khí hiđro để khử hoàn toàn 20,25g kẽm oxit ở nhiệt độ cao. a) Hãy viết phương trình phản ứng xảy ra. b) Tính khối lượng kẽm sinh ra sau khi phản ứng kết thúc. c) Nếu thả lượng kẽm trên vào một dung dịch có chứa 7,3 axit clohiđric. Tính khối lượng muối tạo thành.

Giúp mk vs các bn Mk đang cần gấp

Cho đường tròn (c’):(x+3)^2+(y-2)^2=25. viết phương trình đường tròn (c) biết(c’) là ảnh của (c) qua phép tịnh tiến theo véctơ v=(4,-1)

: Hoà tan hết 11 gam hỗn hợp AL và Fe vào dung dịch HNO3 đặc, nóng (dư) thu được 20,16 lít khí NO2 (đktc). a/ Tính khối lượng từng kim loại có trong hỗn hợp ban đầu? b/ Tính khối lượng từng muối thu được sau phản ứng?

1. Eight years ago we started writing to each other. A. We have rarely written to each other for eight years. B. Eight years is a long time for us to write to each other. C. We wrote to each other eight years ago. D. We have been writing to each other for eight years. 2. The boy was so lazy that he couldn't stay up late to learn his lessons. A. The boy was lazy enough not to stay up late to learn his lessons. B. The boy was too lazy to stay up late to learn his lessons. C. The boy was lazy enough but he stayed up late to learn his lessons. D. The boy was lazy enough to stay up late to learn his lessons. 3. My father is tired of seeing any violent films. A. My father hasn't seen a violent film. B. My father has enjoyed all the violent films he has ever seen. C. My father is worried about missing the next violent film. D. My father never wants to see another violent film. 4. As soon as he waved his hand, she turned away. A. He saw her turn away and he waved his hand. B. No sooner had he waved his hand than she turned away. C. She turned away because he waved his hand too early. D. Although she turned away, he waved his hand. 5. John wishes he had remembered to send Mary a Christmas card. A. John regrets not to send Mary a Christmas card. B. John regrets forgetting not to send Mary a Christmas card. C. John regrets not remembering sending Mary a Christmas card. D. John regrets forgetting to send Mary a Christmas card. 6. My father hasn't smoked cigarettes for a month A. It's a month since my father last smoked cigarettes. B. It's a month ago that my father smoked cigarettes. C. It's a month that my father hasn't smoked cigarettes. D. It's a cigarette that my father smoked a month ago. 7. Having finished their work, the workers expected to be paid. A. The workers expected to be paid because they had finished their work. B. Having their work finishing, the workers expected to be paid. C. Having expected to be paid, the workers finished their work. D. Having been finished their work, the workers expected to be paid. 8. Mr. Brown bought this car five years ago. A. Mr. Brown started to buy this car for five years. B. It has been five years when Mr. Brown has bought this car. C. Mr. Brown has had this car for five years . D. It is five years ago since Mr. Brown has bought this car. 9. John used to write home once a week when he was abroad. A. John doesn't write home once a week any longer. B. John enjoyed being written home every week when he was abroad. C. John never forgot to write a weekly letter home when he was abroad. D. When he was abroad he remembered to write home every week. 10. I haven't enjoyed myself so much for years. A. It's years since I enjoyed myself so much. B. It's years since I have enjoyed myself so much. C. It was years since I had enjoyed myself so much. D. It has been years since I have enjoyed myself so much.

Bài 1 Cho 1 lượng Fe3O4 tác dụng với H2(t•) sinh ra 3,36g Fe a) Viết PTHH b) tính khối lượng Fe3O4 đã phản ứng c) Tính thể tích H2 đã dùng ( Giúp mk nhanh với mk đang cần gấp)

Vẽ đậu mầm:333 Bb: nhận xét bức dưới