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Help Choose the best answer : I go on the Internet every day, but I’ve never (1) __________ more than an hour at a time online. I’ve got laptop and also a smartphone, so I can (2)___________ the Internet anywhere. Today, for instance, I’ve been (3) ____________ three times. Mainly I just (4) ____________ my friends. I read online magazines and I look (5) __________ information, too. I also compare prices of things, (6) ___________ I’ve never bought anything online because I don’t think it’s safe. I’m not an Internet addict, but some of my friends (7) ___________. One friend of mine always looks (8) ___________ because he spends all night online. Although he’s got a lot of bad marks for the exams, he hasn’t (9) ___________ his habits. In my experience, it’s very useful for people who use the Internet (10) ____________. 1. A. spend B. spending C. spent 2. A. have B. use C. play 3. A. online B. Internet C. computer 4. A. write B. email C. send 5. A. at B. in C. for 6. A. because B. but C. although 7. A. is B. were C. are 8. A. tired B. hard C. happily 9. A. change B. to change C. changed 10. A. sensible B. sensibly C. sensibleness

Tìm ba phân số biết tổng của chúng = 1/70 tử số của chúng tỉ lệ với 3 :4 : 5 và các mẫu số tương ứng với tỉ lệ 5 : 1 : 2

Hợp chất Ba(NO3)y có phân tử khối là 261 biết Bari có nguyên tử khối là 137 và hóa trị II tính hoa trị của nhóm NO3

Daisy the cow Last July, Lucy was staying at her aunt and uncle’s farm in the countryside. On the farm they had a lot of black and white cows. Lucy’s favourite cow was called Daisy. She liked her because she had pretty brown eyes. Every morning, Lucy’s uncle took the cows from the farm to the fields. One day, Lucy decided to help her uncle. They took the cows into the field. She was picking flowers when suddenly she saw the cows running out of the field. “Help, I can’t stop them!” she shouted. Her uncle and his dog caught all the other cows, but they couldn’t find Daisy. No one knew where she was. Lucy felt horrible. 1. What did Lucy like about Daisy the cow? => 2. Where did Lucy’s uncle take the cows? => ................................................................................................................................. 3. What was Lucy doing when the cows ran out of the field? => ................................................................................................................................. 4. Who helped Lucy’s uncle to catch the cows? => ................................................................................................................................. 5. Why did Lucy feel horrible? => .................................................................................................................................

hỗn hơp A gồm SO2,O2 có tỷ khối đv CH4 =3 a) xác định % về thể tích mỗi khí trong hỗn hợp A b) cho hỗn hợp B đi qua bình thép có xúc tác là V2O5 thu được hh khí B biết H% của nó là 8%.Xác định % của mỗi khí trong hh B

Ai làm đc câu nào chỉ dùm mình câu đó với ạ mình đánh giá 5 sao luôn ạ. Cảm ơn luôn ạ D. SOME, ANY, MUCH, MANY, A LOT OF, A LITTLE, A FEW & ARTICLES I. Write complete sentences with the given words. 1. I / be / student / Ly Thuong Kiet primary school. 2. There / cat / under / bed. 3. Against / parents’ / wishes / she / want / be / journalist. 4. I/ tired / take / buses. / Let’s / buy / car. 5. Watch/ American / movies / be / way / improve / your / listening skill. 6. She / going / holiday / with / friends / next August. 7. furniture / arrive / you / this morning. 8. He / only / want / a / food / he / not / hungry. 9. There / be / few / large / house / in / village, / the / rest / cottages. 10. He / used / play / football / a / friends. 11. Have / got / money / your / bag? 12. It / not / take / me / time / get / used / live / the / city. 13. He / advise / me / not / spend / lot / time / chat / Facebook. 14. I / suggest / travel / motorbike / as / you / see / lot / beautiful / sceneries / along / street. 15. We / only / move / here / few / day / ago. II. Rewrite the following sentences, beginning with the given words. 1. He didn’t invite many people to his birthday party. He only ...................................................... 2. I only spoke to a few people at the party. I didn’t .................................................................................. 3. There was a little rain last night. There wasn’t ........................................................................... 4. I have no word for this problem. I don’t ..................................................................................... 5. I only carry a little money in my bag. I don’t .......................................................................................... 6. He doesn’t want much food because he is not hungry. He only ............................................................. 7. There are a few trees in the garden. There aren’t ................................................................................... 8. It didn’t take me much time to get used to living in the city. It took ...................................................... 9. Tom drives better than Tony. Tom is ...................................................................................................... 10. Mary doesn’t cook as well as Laura. Laura is ........................................................................................ 11. She studies far more seriously than she used to do. She is ...................................................................... 12. Peter doesn’t have many friends in this city. Peter has .......................................................................... 13. My father swims better than my mother. My father is ............................................................................ 14. There aren’t many people in the hall. There are ..................................................................................... 15. He doesn’t spend much time doing morning exercises. He spends ........................................................

Một xe ô tô chuyển động trên đoạn đường thẳng: 1/3 quãng đường đầu chuyển động với vận tốc v1 = 60 km/h, quãng đường tiếp theo chuyển động với vận tốc bằng vận tốc trung bình trên cả quãng đường, quãng đường còn lại chuyển động với vận tốc v3 = 15 km/h và hết 1/3 tổng thời gian. Tính vận tốc trung bình của ô tô trên cả quãng đường. Đăng lại coi có ai giải đc ko

MN ơi giúp em làm đc câu nào thì làm Em đăng 2 lần r đó ạ Giải phương trình nghiệm nguyên a) $x^{2}$ + x - $y^{2}$ - 9 = 0 b )$x^{2}$ + xy - y = 2 c ) $2x^{2}$ + xy + 3y = 3 d) $\frac{3}{x}$ + $\frac{3}{y}$ = 5

A=3 phần căn x +1 - (x lớn hơn 0) B=căn x +16 phần căn x + 5 -(x lớn hơn hoặc = 0) C=2 căn x +19 phần căn x +3 -(x lớn hơn hoặc = 0)