:) anh là Kudo Shinichi em còn nhớ ko :^

III. Choose the word or phrase among A, B, C or D that best fits the blank space in the following passage. Have a walk (1) a beach, listen to the sound of the sea waves, and suddenly you see a lot of rubbish on the beach. Pollution takes away all the (2) of our beaches. I feel really annoyed (3) I see plastic bags lying on the sand, cigarette ends buried in the sand, and soda cans floating in the sea. There are a lot of things that we can do. (4) we see rubbish, we should do our part in the protecting the land (5) picking it up and throwing it in dust bins. (6) , we can form some kind of organization that helps (7) the beaches. If everyone does their part, the beaches will be a wonderful and beautiful place. We need to start now (8) the beaches are damaged beyond repair. 1. A. on B. in C. at D. over 2. A. beauty B. beautifully C. beautiful D. being beautiful 3. A. before B. after C. when D. while 4. A. While B. Soon C. Unless D. If 5. A. by B. with C. of D. in 6. A. Nevertheless B. Moreover C. However D. Therefore 7. A. cleaning up B. cleaning up C. clean up D. clean off 8. A. when B. after C. until D. before

II. Complete the sentences, using the correct form of the words in brackets. 1. Light pollution make us to see the stars in the sky. (able) 2. Noise is considered as pollution. (environment) 3. The soil becomes because of the use of so many pesticides and fertilizers. (contaminate) 4. waste spills can contaminate groundwater. (industry) 5. habitats have been destroyed in recent years. (nature) 6. A number of cleaning products contain chemicals. (harm) 7. Water samples collected at these villages were seriously with bacteria. (contaminate) 8. People believe that the water has brought cancer to the local residents. (pollute) 9. In many developing countries, water pollution is usually a leading cause of . (die) 10. elements have been found in both ground and underground water sources. (pollute) 11. Fish and many other animals are killed by in their habitat. (pollute) 12. Astronomers are concerned about light pollution because they have in viewing activities in the sky and outer space. (difficult)

Bảo gì thì bảo lun anh :^

Bạn trả lời được rồi thì hỏi làm gì rồi bảo ngta trả lời sai

EXERCISES I. Complete the sentences with the correct verb form in the bracket. 1. If we meet at 9:30, we (have) plenty of time. 2. If you (find) a pen in the cellar, don’t mention it to anyone. 3. The zookeeper would have punished her with a fine if she (feed) the animals. 4. If you pass your examination, we (have) a celebration. 5. Lisa would find the milk if she (look) for it in the fridge. 6. What (happen) if I press this button? 7. The door will be unlocked if you (press) the green button. 8. I should have voted for her if I (have) a vote then. 9. If you go to Paris, where you (stay) ? 10. If you (swim) in this lake, you’ll shiver from cold. 11. Unless you (tell) the truth, I won’t help you. 12. You’ll get pneumonia if you (not change) your wet clothes. 13. If I had known that you couldn’t eat octopus, I (not buy) it. 14. If they (hang) that picture lower, people would be able to see it. 15. She (be) able to walk faster if she didn’t have such high-heel shoes. 16. I (bring) you some beer if I had known that you were thirsty. 17. If you had touched that electric cable, you (be) electrocuted. 18. If the story hadn’t been true, the newspaper (not print) it. 19. I (not buy) things on the installment system if I were you. 20. Dan (arrive) safe if he drove slowly.

\(s=4,5km=4500m\\ t=0,75s\\ \Rightarrow v=\dfrac{s}{t}=\dfrac{4500}{0,75}=6000\left(\dfrac{m}{s}\right)\\ \Rightarrow vật.liệu.làm.đường.ray.xe.lửa.là.thép\)