a, F = {100;101;102;…;999}; b, E ={1;2;3;4;5;6;7;}.

Giúp mình với mình đang cần gấp

Exercise 3: Put the correct form of the verbs in brackets 1. The boys love ( play ) __________ soccer after school . 2. The doctor advised Mr Ha ( not do ) __________ any work hard . 3. My grandmother used ( tell ) __________ us stories in the evening. 4. Revision is necessary in (learn ) __________ words . 5. I’ll try ( improve ) __________ my Math next semester . 6. The girls enjoy ( practise) __________ fitness exercises after school 7. His father asked him (drive) __________carefully . 8. Tom used (learn)__________Math badly but now he is good at it . 9. We are interested in ( clean)__________up beaches . 10. We finish (collect) __________broken glasses at six thirty 11. Would you like (listen) __________to some music? 12. Nam enjoys ( play) __________soccer after school. 13. Lan asked me (go) __________to the supermarket. 14.I think you should (do) __________the morning exercise. 15.They used (go) __________to work by train. 16. Don’t let children (play) __________alone. 17.You ought to (do)__________the homework yourself. 18.Mr Hung asked me (tell) __________him the truth. 19.They asked their children ( stay) __________at home. 20.I’d like (buy) __________some new clothes.

Mọi ng ơi làm giúp em Wold foms dc ko ạ. Em đang cần gấp, em sẽ vote 5 sao và ctlhn

mọi người giúp mình với ạ 1. Helen knew her fear was * 1 điểm A. Logical B. Unreasonable C. Based on past experiences D. Quite common 2. Why hadn’t Helen learnt to swim when she was young? * 1 điểm A. She had always been terrified of water. B. She hadn’t had the opportunity. C. She had distrusted her instructor at school. D. The school pool had been too deep. 3. What happened the first time Helen had swimming lessons? * 1 điểm A. She didn’t get over her fears. B. She was afraid of the teachers. C. She managed to swim a reasonable distance. D. She nearly drowned. 4. How did Helen’s family react to her repeated effort to learn to swim? * 1 điểm A. They criticized her. B. They supported her. C. They were patient with her. D. They made fun of her. 5. At the Splash school, the instructors * 1 điểm A. Made her learn at the group’s pace B. Bullied her C. Didn’t rush her D. Explained her fears to her 6. Why did Helen go to a hypnotherapist? * 1 điểm A. She realized she would never be able to swim. B. She suddenly lost her courage. C. She suddenly forgot how to swim. D. She wanted to forget her past fears. 7. Which of these phrases best sums up the article? * 1 điểm A. Fear can be useful. B. Not everyone can do everything. C. You should never give up. D. Everyone is different.

Tính: (39 - 19) : [(36 - 11) : 5].

Vẽ hình ngũ giác theo kiến thức công nghệ 11. Mình không biết vẽ sao hết, cô mình yêu cầu thế

tìm điều kiện xác định của √ $\frac{ √x-3}{x-9}$ + $\frac{1}{ √x-1}$ help me mng oi iu mng nhiều

Exercise 2: Use Gerund or Infinitive 1. Stop__________( argue ) and start ( work )______________ 2. I like ( think ) __________carefully about thing before ( make ) __________ a decision 3. Ask him ______( come ) in . Don’t keep him ____( stand ) at the door 4. Don’t for get _________ (lock ) the door before ______( go ) to bed 5. Did you succeed in _____( solve ) the problem ? Let me __________( suggest ) some solutions 6. Peter used _____ ( be ) a football player . He had to stop ______( play ) because of an injury 7. Don’t try ________( persuade ) me . Nothing can make me ( change ) __________my mind 8. Most people prefer __________ ( ride ) to __________ ( walk ) 9. Do you mind __________ ( see ) these photos again 10. My father suggested (go ) out ______ for dinner. Giúp mình nha mình cần tầm hơn 1 tiếng nx=))

Dùng V lít khí CO khử hoàn toàn 4 gam một oxit kim loại(A2Ox), phản ứng kết thúc thu được kim loại và hỗn hợp khí R. Tỷ khối của R so với H2 là 19. Cho R hấp thụ hoàn toàn vào 2,5 lít dung dịch Ca(OH)2 0,025M người ta thu được 5 gam kết tủa. a. Xác định kim loại và công thức hoá học của oxit đó . b. Tính V.(Biếtcác thể tích khí đo ở đktc)