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Một ô tô đi từ A đến B xe khởi hành lúc 7 giờ với vận tốc 50km/h . Đến B xe nghỉ 1h 30 phút rồi trở về A với vận tốc 60km/h. Ô tô về đến A lúc 14 giờ. Tính quãng đường AB? Giải chi tiết giúp mình, mình đang cần gấp

I. Change the following sentences into passive voice. 1. Mr Tuan delivered the speech yesterday. 2. Turn off the computer at night. 3. I clean the floor everyday. 4. My mother bought this dress this morning. 5. She did this exercise two days ago. 6. They send him abroad to study chemistry. 7. Nobody has used this room for a long time . 8. Someone has stolen my bike. 9. He has just received a letter from his parents. 10. She will buy this house. 11. They are building my house. 12. Lan was making my new dress at this time yesterday. II. Make complete sentences using the given cues. 1. you / send / letter / yet ? 2. Nile / longest / river / in / world 3. Hoa / salary / high / than / Tom/is 4. He / work / hard / order/ pass / exam 5. Early this morning / children / decide / go / a run 6. Sydney opera / complete / 1973. 7. The road / join / two villages / be / narrow. 8. It / not difficult / translate / this sentence/ English 9. You / mind / lend / me / dictionary ? 10. New bicycle /make / Japan / be / expensive. 11. you / see / film / Jurassic Park / yet ? 12. The Mekong river / long / the Red river 13. Ba / interlligent / Nam 14. Sears Tower / short/ PETRONAS Twin Towers 15. Mexico city / big / in the world 16.Ba / good / in our class. III . Put the words in brackets into the correct forms. 1. All the …………………………. in the debate had a chance to speak. (PARTI CIPATE) 2. He is the only ……………………. that has not run this race before. (COMPLETE) 3. Laszlo Biro was…………..………. the pen- point pen. (INVENTION) 4. The ……………………of Christmas tree is indispensable at Christmas. (DECORATE) 5. The main problem is ________ prices. Things are getting much too expensive. (rise) 6. Our father’s company sells only __________ goods. (import) 7. “ You look __________ when you see me.” – “ Yes, I think you are in China.” (surprise) 8. He finds housekeeping a ___________ task. (bore) 9. Mary appeared with a ___________ smile. (please) 10. Mr Smith seems quite ___________ with his new job. (satisfy)

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giải thíchhhhhhhhhhhhhhhhhhhhhhhhh

Cho m>n. Chứng minh rằng 2m+3> 2n+3

Vẽ đậu mầm hoặc chibi hay kể tên 1 số bài hát VN

Vẽ chibi có màu.........................

1 lần bình đang đi trên ô tô, nhìn qua cửa kính thấy minh đang đi bộ ngược chiều. 30 giây sau, bình xuống xe tìm minh. để đưởi kịp minh bình phải đi nhanh hơn minh 3 lần nhưng chậm hơn ô tô 8 lần. hỏi mấy phút nữa bình đưởi kịp minh

khi xóa 2 chữ số tận cùng của 1 số tự nhiên ta được số mới kém số ban đầu 1989 đơn vị tìm số tự nhiên đó