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Chuyển sang câu bị động: change these sentences into passive voice 1. People grow rice in many countries in the world. -> Rice ______________________________________________________________ 2. Graham Bell invented the telephone many years ago. ->The telephone _______________________________________________________ 3. Lan practices English every day. -> English ____________________________________________________________ 4. Mary sent me this letter two days ago. -> I ___________________________________________________________________ 5. People make compost from vegetables. -> Compost _______________________________________________________ 6. I saw a strange man in my garden yesterday. -> A strange man ________________________________________________________ 7. They clean the floor every morning. -> The floor ___________________________________________________________ 8. They made these cars in the USA. -> These cars __________________________________________________________ 9.We planted many trees in the school garden. -> Many trees __________________________________________________________ -> English __________________________________________________________ 10. My father often reads books before bedtime . -> Books ................................................................................................................ 11. Lan bought some comic books for her brother . -> Some comic books .................................................................................................... 12. My sister received a letter yesterday . -> A letter .................................................................................................................. 13. Nowadays people use electricity for lighting. -> Electricity .........................................................................

In the world today there are 5,000 to 6,000 living languages, of which English is the most widely used. As a mother tongue, it ranks second only to Chinese, which is little used outside China. English is the most international of languages. It is used as the language of aviation, international sport and pop music. Sixty percent of the world’s radio stations broadcast in English, and more than half of the world’s scientific papers are printed in English. It is true that a great number of people are involved in the use of English. To people in Africa, Asia, and South America, English is an important foreign language to master. In most countries in the world, the English language is used as the language of business, commerce, and technology. English is now an effective medium of international communication. However, it is the written English which is not systematically phonetic, that causes difficulties to non-native speakers. 31. Which language is used as the language of aviation, international sport and pop music? _______________________________________________________ 32. Why is English an important foreign language used in many countries? _______________________________________________________ 33. What difficulties may learners of English be confronted with? Why? _______________________________________________________ 34. Name three countries in which English is spoken as a first language. _______________________________________________________ 35. As a mother tongue, why does English rank second only to Chinese? _______________________________________________________