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Cho p và 3p + 1 là các số nguyên tố. CMR 5p + 1 cũng là số nguyên tố Giúp
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1. Choose the word which is pronounced differently from the others. A. student B. bus C. duty D. unit 2. What is your favourite food? A. I favourite chicken B. My favourite food chicken C. Chicken favourite me D. I like chicken best. 3. Linda ……… her hair every day. A. washes B. wash C. clean D. cleans 4 .How many minutes are there in………… hour? A. a B. an C. the D. these 5. Choose the words that is different from the rest in each group. A meat B. fish C. beef D. tea 6. Does Mrs. Mai go to school _______ car? - Yes, she does. A. on B. in C. by D. of 7. It works like this.--> Oh, __________ A. I see B. By the way C. Not at all D. Yes 8. Is he good __________ Physics and Math? A. for B. at C. on D. in 9. I can’t speak French but my brother __________. A. can B. can’t C. does D. doesn’t 10. My mother always wants me __________ the piano well. A. to play B. playing C. play D. to playing 11.Choose the words that is different from the rest in each group. A. knee B. gray C. nose D. toe 12. Are you tired?---> __________ A. I see B. By the way C. Not at all D. Ok 13. __________! You've got a new bike. A. Wow B. Great C. Congratulations D. Goodbye 14. You passed the final examination,----> __________ A. Wow B. Great C. Congratulations D. See you then

I.Read the text, and decide whether the statements are True or False. Worker robots are becoming more popular in industries. Nowadays they can do more difficult jobs in many factories. The use of robots helps factories increase the quality of their products because robots can do the job well for many hours while humans can gettired and bored. Engineers can make robots more effective and useful at home, at school, and at work. However, a robot uses on average about 100 more times energy than a human to do the same job. The latest 20 kg robot can lift 2 kg, but a 5 kg human arm can lift 50 kg. True False 1.Factories are using more robots. o o 2.The use of robots helps make the quality of the products better. o o 3.Robots play an important role at homes, at schools, and in offices. o o 4.For the same job, a robot uses the same amount of energy as a worker does. o o 5.With the same weight, a robot lift things heavier than a man can do. o o II.Read the passage, and then answer the questions. People are very interested in robots. Some of them look like mechanical dolls to play with. Most of them look like other machines of today’s high technology. Serious research on intelligent robots began in the 1960s in several countries. Now we are on the fifth generation of robots. The first robots were very expensive. They cost $500,000 when a worker could do the same work for $15 an hour. By the early 1970s, a robot brain, a computer, cost $300,000. Today’s robots cost from $15,000 to $150,000. One of the advantages of robots is that they can work in situations that are dangerous or harmful for human workers. Today there are millions of people who work at machines in the world. Robots will replace them. Part of the problem will be solved because of the decrease in the number of births. There will be fewer people looking for jobs. Many people will find changes in their jobs, and they will not like some of them. The students of today must be sure that these changes are good. Robots must improve, not harm, the quality of human life. What generation of robots are we on now? _____________________________________________________________________ What is one of the advantages of robots? _____________________________________________________________________ What makes a robot brain? _____________________________________________________________________ Why aren’t people no longer worried that robots will replace them? _____________________________________________________________________ What is the thing that students of today are sure? _____________________________________________________________________

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