Cho bt công thức hoá học hợp chất của nguyên tố X với O và hợp chất của nguyên tố Y với H như sau (X,Y là nguyên tố nào đó):XO , YH3 chọn công thức nào đúng A.XY3. B.X3Y C.X2Y3 D.X3Y2 Chi tiết cách giải giùm

calli " 7@1 NL: vừa cãi nhau với con bạn xg bây giờ k cs ai để nt Ai nt vs tui k

GIÚP MK VS. AI NHANH MK VOTE CHO ẠK

III. Give the correct word form. (2 pts) 1. Many adults learn English because it is (usage)_____________ for their work. 2. The Internet helps people communicate with friends and (relation)______________. 3. Since the (introduce)______________ of Malay in schools, it has become the most commonly used language in Malaysia. 4. They have to go to work though it is raining ____________. (hard) 5. The most _________ earthquake in 1923 in Japan killed about 150,000 people. (disaster) 6. It was the biggest _____________ of Vesuvius for some years. (erupt) 7. Nguyen Du was the ___________ who wrote “Kieu”. (write) 8. Christmas is a great____________ in many countries. (celebrate)

1. He (see)…………………….… her while he (walk)…………………….……. down the street yesterday. 2. After he (do)……………………… his homework, he went to the cinema. 3. Tom (play) ……………..……. football when he was a little boy. 4. Let’s go for a walk as soon as it stops (rain) ……………………..……. 5. Last night, when I (come) ………….. there, they (already/go) ……….. to the party. 6. Do you remember (read) ……. about it? No, at that time I was too young (read)……… newspaper 7. My brother is a stamp collector. He started (collect)……………..…… stamps when he (be)……… 15 years old. He (collect)……………. many kinds of stamps. 8. The last time he (see)……………….……. in public, he (wear)………………..….. a great suit. 9. We (not/see)………………..… her since she (leave)……………………….. school. 10. Lan said that she (get) ……………………….. married soon. 11. My brother (go)………………..… to bed after he (turn)………………….….. the lights off last night. 12. She is not accustomed to (take)………………..…. care of by others 13. We (live) ………………….… in the house since we came here 14. She entered the university after she (graduate)………………..….. from high school. 15. They (finish)……………………... the project by the end of the next year. 16. When Mark arrived, the Johnsons (have) …….. dinner, but they (stop)………… to talk to him. 17. They (live)…………………….. next door to my house since I (be)……………….….. young. 18. By the end of the next year, I (work)………..….. for him for 25 years. 19. While she (talk) ……….on the phone, the children (start)…… fighting and (break)……… a window. 20. When I (be) ……………..….. a boy, I often (go)……………..….. fishing with my father. 21. Columbus (discover)………………….. America 500 years ago 22. When I (leave)……….…. my office last night, it (still/rain)………………….. very hard. 23. What do you think the children (do)……..….. when we (get)………. home tomorrow? 24. He (lose)…………… his job last month and since then he (be)……….... out of work 25. When we (come)………..….. there last night, they (be)…………… there for an hour 26. When we arrived there, they (already/have)……………………... dinner 27. Mary (never/see)……………………….. such a beautiful house 28. When she (enter) ……….….. the office this morning, he (already/go) ………..out 29. We (study)……………… almost every lesson in this book so far. 30. That author doesn’t mind (criticize) ……………….. by his friends 31. He spends a lot of time (read) …………………….... books. 32. I don’t enjoy (take) ………………………. care of as if I were a child. 33. I (be) …………………..…. to London several times this year. 34. The film we saw (be)……….... sad. It (make)……… me (cry)…………………… 35. She couldn’t get into the house because she (lose)……………………….. the key. 36. He (be) ………………………..… a newspaper reporter before he became a businessman 37. I (never/see) ……………………… any of Picasso’s paintings before I visited the art museum. 38. No one (enjoy) …………………………. (deceive)………………..……. by the others 39. When I (arrive) …………… at his house this morning, he (still/sleep) …………….. 40. I prefer (telephone) ……………….…… to (write) ………………….… letters. 41. He was made (sign) ………………..…….. a paper admitting his guilt 42. He usually (wear) ………. sandals but when I last (see) ……….. him, he (wear) …………. boots. 43. He discovered how (open) ………………..… the safe. 44. She doesn’t old enough (travel) ……………….…… by herself. 45. Most people prefer (spend) …………. money to (earn) …………. it.

II. Supply the correct form of each verb in brackets. (1 pt) 1. He ______________ in China since January. (be) 2. “Gone with the Wind” is the most interesting film we ______________ recently. (see) 3. - _________ you _________ Nam last Sunday? (see) - Oh, no. I ______________ him for many days now. (not see) 4. When _________Nam and Hoa last _________? (meet)

giúp mình bài 2 vs nha mng vote 5* + ctlhn cho ng nhanh nhất nè

Tính vị trí ảnh, độ phóng đại ảnh. Biết rằng vật đặt cách thấu kính một khoảng 7cm.Thấu kính có tiêu cự 3 cm.

Giúp mình với ạ🥺 Đang cần gấp:>

Cho Aa lai Aa tìm TLKH và TLKG của F3