71. Let me (introduction) ______ myself. I am Peter. * 1 điểm 72. Telephone is a device transmitting (speak) ______ over a long distance. * 1 điểm 73. Last year we had an (enjoy) ______ summer vacation. * 1 điểm 74. He speaks English (nature) ______ after living abroad for a long time. * 1 điểm 75. She actively (participation) ______ in social work last year. * 1 điểm 76. The kitchen can be a (danger) ______ place for children. * 1 điểm 77. The (magic) ______ sawed the girl into two halves. * 1 điểm 78. The air is seriously (pollution) ______ with traffic fumes. * 1 điểm 79. (Fortunate) ______, her step mother didn't treat her well. * 1 điểm 80. Hard work always bring (succeed) ______. * 1 điểm 81. Marconi was the (invent) ______ of the radio. * 1 điểm 82. His (pronounce) ______ of some words is not correct. *

Giúp em với ạ tối nay phải nộp r ạ

GHI CÔNG THỨC HTD PLSSSSSSSSSSSSSSSSSS

Cho ΔABC có ∠B = 60 độ. Hai tia phân giác AD và CE của ∠BAC và ∠ACB ( D ∈ BC; E ∈ AB ) cắt nhau tại I. CMR: ID = IE. [ Bài này là thi hsg TP.HCM năm 2004 - 2005 nha mng ]

Câu 7. Cacbon có hai đồng vị bền là 12C và 13C và Ac =12,01 Tính % khối lượng của 12C trong hợp chất Na2CO3 ( cho MNa = 23; Mo = 16)

giúp mk với ạ .....................

Em cần tự viết ạ chứ chép mạng em ko cần:(( ( lưu ý: 2 đoạn văn diễn dịch và quy nạp về chủ đề đó ạ)

1. Where are the childrens'/ children's friends? 2. My sister / sister's friend is a teacher. 3. The boys's / boys' toys are on the carpet. 4. Is this my brother/ brother's jacket? 5. My cousin / cousin's name is Joanna. Tade 6. Peter is at this aunt/ aunt's house. 7. Is this Peter's / Peters' house? 8. What is your dog / dog's name? 9. My dad's / dad car is very nice. 10. My brothers' / brother names are Frank and Fred. 11. Do you like Tom and Mary's /Tom's and Mary's house? 12. My friend's / friends father is a doctor. 13. My grandfather's /grandfathers' watch is on the shelf. 14. Where is Nicks' Nick's racket? 15. My uncle's / uncles' family lives in New York

1. Jane visits her friends in London. →​ 2. That man has an important test tomorrow. →​ 3. What do they buy for they day? →​ 4. Where does he stay for the night? →​ 5. Who will take care of children? →​ 6. The tourists stop at the restaurant. →​ 7. We won't go there next week. →​ 8. The woman washes the car on weekends. →​ 9. Most of us are playing hide and seek. →​ 10. The boy doesn't prepare for the test. →

giai nhanh giup minh voi( ghi cau tra loi )