a>(x+y+4).(x+y-4) b>(x-y+6).(x+y-6) c>(y+2z-3).(y-2z-3) d>(x+2y+3z).(2y+3z-x)

(cho em xin dấu hiệu nhận biết ạ) I. Supply the correct tense of the verbs in parentheses to complete the sentences. 1. I _____________ to live here three months ago. ( moved ) 2. They_____________ from their old form teacher for ages. ( not hear) 3. My father (not watch) __________TV last night. 4. Would you mind (tell) __________ us about your family? 5. When I was a child, I (hate) __________being at home alone. 6. Be careful! The children (cross) __________the street. 7. Lan and I (be) __________ close friends since we were primary school students. 8. Why didn’t Tom answer the phone yesterday? He (take) __________ a shower upstairs. 9 9.You will be late if you (not hurry) __________ . 10. I (come) __________ and see them before I leave here. 11. My father (not watch) __________TV last night. 12. Would you mind (tell) __________ us about your family? 13. When I was a child, I (hate) __________being at home alone. 14. Be careful! The children (cross) __________the street. 15. A new textbook (publish) __________ next year. 16 This bridge (finish) __________ recently. 17. Her son (not / visit) __________ her very often. 18. They __________ on the beach when it started to rain. (sunbathe) 19. Would you mind if I ___________ in the front seat of the taxi? (sit) 20. Mai ____________ sick for two days. (be) 21. Listen! I think the telephone __________ . (ring) 22. When he arrived, I ________ dinner. (cook) 23. The teacher ordered Tom _______ to the blackboard. (go) 24. Angkor Wat _______ around the year 1100. (build) 25. Lan and I ________ close friends since we were students. (be) 26 . If we (not/waste) ________ paper, we will save thousands of trees. 2. 27 What you (do) _______ this time next Sunday? 3. 28. Because it (rain) _________ heavily, the road in front of my house was flooded. 4. 29. By the time we arrived at the canyon, it (stop) _________ snowing.

Chọn đáp án nào đúng và giải thik vs mn

giúp mình giải bài này với. mình giải ko được 1) A=(m-1,4] B=(-2,2m+2) Tìm m để : a) A ∩ B khác ∅ b) A ⊂ B

làm nhanh giúp mình đầy đủ lời giải phép tính nha mình cần ngay bây giờ xin các bạn

dd X chứa các ion : Ca2+, Na+, HCO3- và 0,1 mol Cl-. Cho 1/2 dd X pứ với dd NaOH dư , thu được 2 gam kết tủa A.Cho 1/2 dd X còn lại pứ với dd Ca(OH)2 dư thu được 3g kết tủa A. Mặt khác, nếu đun sôi đến cạn dd X thì thu được m gam chất rắn khan. Tính giá trị m

vẽ cho mình bức dưới đây tô màu nhá

i ( not , meet ) ................ him at sally is party the man ( not , stop ) ............. boasting about his accomplishment we ( not , see ) ........................... to the football match yesterday ko cần ghi lại cả câu ghi từ cần điền là được

6x^2-(2x-3)(3x+2)-1=0 tìm x nha mọi người

giải giúp mình bài 3,4,5 ạ mình cảm ơn <3