Read the following passage and choose the correct answer for each gap. I surf the Internet every day, but I’ve never (1)………. more than an hour at a time online.I’ve got a laptop and also a smartphone, so I can (2)………….. the Internet anywhere. Today, forinstance, 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 onlinebecause I don’t think it’s safe.I’m not an Internet addict, but some of my friends (7)………….. . One friend of mine alwayslooks (8)…………… because he spends all night online. Although he’s got a lot of bad marks forthe 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

Các cậu giải giúp mình vớiiii 🥺

Vật chất di truyền cấp độ phân tử có tên là gì? Có phải tất cả sinh vật đều có vật chất di truyền cấp độ phân tử như nhau?

Tìm phân số có tử bằng 9 biết giá trị của nó lớn hơn -11/3 và nhỏ hơn -11/15

Tính giá trị của biểu thức một cách hợp lí: ($(50^{2}$ + $48^{2}$ + $46^{2}$ +...+ $2^{2}$) - ( $49^{2}$ + $47^{2}$ + $45^{2}$ +...+ $1^{2}$)

tìm x a, ( 2600 + 6400 ) - 3x =1200 b, [ (6x - 39) : 7 ] .4 = 12

Bài 1: Điền vào chỗ trống(tương lai gần ở dạng bị động) 1. She (work) __ here for five years. 2. I (study) __ all day. 3. You (eat) __ a lot recently. 4. We (live) __ in London for six months. 5. He (play) __ football, so he's tired. 6. They (learn) __English for two years. 7. (Cook) __ so I'm really hot. 8. She (go) __ to the cinema every weekend for years. 9. It (rain) __ the pavement is wet. 10. You (sleep) __ for twelve hour. 11. I (not/work) __ today. 12. You(not/eat) __ well recently. 13. We (not/exercise) __ enough. 14. She __ (not/study). 15. They (not/live) __ here for very long. 16. It (not/snow) __. 17. He (not/play) __ football for five years. 18. We (not/drink) __ enough water, that's why we feel tired. 19. I (not/sleep) __ I was reading. 20. They (not/watch) __ TV much recently. LÀM HỘ MIK VS Ạ

cho pt ax^+bx+c=0 có 2 no : x1;x2 và a>0 a) cmr nếu x1<=m<=x2 thì am^2+bm+c<=0 b) cmr nếu m<= x1<=x2 thì am^2+bm+c=>0 c ) cmr nếu x1<=x2<=m thì am^2+bm+c=>0

giải giúp em câu này với ạ. em cảm ơn ạ

mik cần cs đáp án sau 15p nx các bn giúp mik nha