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Tại sao bệnh HIV-AIDS lại ko có thuốc đặc trị?

11. Much progress ____ been made in recent years. A. have B. has C. having D. to have 12. Collecting old coins and paper notes ____ one of my hobbies. A. being B. were C. are D. is 13. The number of pupils getting poor marks since the beginning of the semester ____ appalling. A. to be B. have been C. are D. is 14. Five thousand pounds ____ stolen in the robbery last night. A. being B. were C. are D. was 15. Mr. Thomson with his wife and his three children ____ abroad. A. to be B. have been C. are D. is 16. One of the girls who ____ working in this department ____ my niece. A. is/being B. are/is C. is/are D. was/were 17. The English ____ to drink tea. A. likes B. to like C. like D. has liked 18. Everybody ____ trying to do their best at present. A. to be B. have been C. are D. is 19. Jim as well as I ____ always busy doing English homework. A. am B. has been C. are D. is 20. Neither Daisy nor I ____ glad to do that. A. am B. has been C. are D. is 21. That you take a computer course ____ very necessary. A. am B. have been C. are D. is 22. The police ____ come to the site of the accident. A. have B. has C. having D. to have 23. The pilot along with his passengers ____ rescued last night. A. am B. have been C. was D. is 24. What we need most ____ books. A. is B. were C. are D. to be 25. My brother together with his friends often ____ in the park. A. jogs B. jogging C. jog D. to jog 26. Neither he nor they ____ here yesterday. A. are B. were C. is D. be 27. Either John or his children ____ breakfast each morning. A. make B. makes C. making D. to make 28. I don’t like the hot weather. Thirty degrees ____ too warm for me. A. was B. are C. being D. is 29. Not only a dog but also two cats ____ at home in his garage. A. was B. are C. been D. is 30. Both a poem and a short story ____ been written by the young author. A. has B. to have C. have D. having

They regret that Tom couldn't catch Jerry. -> They wish Tom ......................................... Quan trọng là giải thích chứ đáp án mình có rồi.

Giải phương trình : (x-1)/(x^2+1)=0,2

Hòa tan 28 g kim loại Fe và dung dịch axit clohiđric 10% Tính nồng độ phần trăm dung dịch muối zncl2 sau đó phản ứng cho Fe = 56 độ c l = 35,5 h = 1 S = 32 ai O = 6

trào lưu cải cách duy tân ở việt nam nửa cuối thế kỷ xix

làm câu b c d của bài 3 trong hình sau

Đoạn thơ không sử dụng từ “ xuân” nhưng ta vẫn thấy hiện lên khung cảnh mùa xuân thiên nhiên xứ Huế thật tươi sáng, thơ mộng, giàu sức sống. Hãy chỉ ra các tín hiệu mùa xuân trong đoạn thơ để lí giải điều đó Bài mùa xuân nho nhỏ