bài 26: tìm số tự nhiên n phân số A=8n+193/4n+3 có giá trị số tự nhiên bài làm - Vì 8n+193 chia hết cho 4n+3 => 4n+3 cũng chia hết cho 4n+3 =>4.(8n+193)-8.(4n+3) cho mình hỏi chỗ này đóng ngoặc là vì có dấu trừ đúng không ạ và dạng này luôn luôn có dấu trừ ở chỗ =>4.(8n+193)-8.(4n+3)..... và dạng này luôn luôn không có dấu trừ ở chỗ =>4.(8n+193)-8.(4n+3)..... vì nếu có dấu cộng thì n không thể bị triệt tiêu được còn có dấu trừ là n bị triệt tiêu mình nói đúng, làm đúng và giải thích đúng không ạ xong mik vote 5 sao và ctlh cảm ơn nhiều ạ giúp mik với

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mk cần gấp ạ đề là: V Give correct form of the words: 25. I like learning English because it is very necessary for my study, my knowledge and_________ opportunity. (EMPLOY) 26._________ in French and German is required for this job. (FLUENT) 27.Please _________ the instructions so that the children can understand them. (SIMPLE) 28.The house was built in _________ of a Roman villa. (IMITATE) VI. Read the following passage and decide which answer best fits each numbered blank. When you read something in a foreign language, you frequently come across words you do not fully understand. Sometimes you (29) _________ the meaning in a dictionary and sometimes you guess. The strategy you adopt depends very much upon the (30) _________of accuracy you require and the time at your disposal. If you are the sort of person who tends to turn to the dictionary frequently, it is (31) _________ remembering that every dictionary has its limitations. Each definition is only an approximation and one builds up ar, accurate picture of the meaning of a word only after meeting it in a (32) _________ of contexts. It is also important to recognize the special dangers of dictionaries that translate from English into your native language and vice versa. If you must use a dictionary, it is usually far safer to consult an English-English dictionary. 29. A. inspect B. control C. examine D. check 30. A. extent B. level C. degree D. range 31. A. worth B. essential C. valuable D. vital 32. A. multiple B. variation C. variety D. diversity VII. Read the following passage and answer the questions by choosing the option A, B, C or D. Do you often use shampoo or put ketchup on your food? Have you ever visited a sauna? If you think these words are originally English, you'd better think again. In fact, each of these words comes from a different language! Shampoo, for example, is actually a word from the Hindi language in India. This word originally meant "massage". In hair shops in India, barbers massage your head while washing your hair. Over time, British people in India used this word to mean a liquid that cleans hair. Almost everyone knows what ketchup is. People all over the world like to pour this sauce on French fries or sandwiches. This word is original Chinese (from ketsiap, a fish sauce). In the 1600s, British and Dutch sailors brought the fish sauce to Europe. Over time, people change the sauce by adding tomato flavour to it, but the name basically stayed the same. Sauna, a popular type of public steam room and shower facility, comes from the Finnish language. During one of the European Olympics, athletes from Britain and Germany saw Finnish athletes use saunas after training. Later, the general public all over Europe started using this style of bathing, too. Now, we still use this word to describe all kinds of steam rooms. English is full of many wonderful borrowed words from many languages. Perhaps English should change its name to Eng-hin-chi-fre-ger-ital-span-ish! 33. What is the main idea of this passage? A. Usage of words from other languages in English B. English words in other languages C. The most popular borrowed words D. Words from India 34. What did the original word for ketchup mean? A. A kind of fish B. A kind of fish sauce C. A hair shop D. A red tomato sauce 35. Which of the following words is from Hindi? A. shampoo B. ketchup C. sauna D. massage 36. Why does people start to use the word "sauna"? A. Athletes made it popular at home. B. The public liked the Olympics C. The Finnish travelled a lot. D. It was good after training VIII. Rewrite the following sentences based on the given words. 37.He makes a lot of mistakes in pronunciation. His foreigner friends often don’t understand him. → If he 38. I think you should spend at least 1 hour every day to practice speaking English in order to communicate fluently. → If I were 39.I have just lent him my English – Vietnamese dictionary. I bought that dictionary one month ago. → Ihave just (which) 40. This English course is very helpful for me. The course focuses on developing communicative skills. → This English course (that)