Unit5 Look into Science一、单项选择 1. The rivers will become dirtier and dirtier we take action to protect them. A. since B. if C. until D. unless 2. Though I the phone number many times, the foreigner still couldnt write it down. A. repeated B. refused C. researched D. recognized 3. --- Will you fix up the machine according to the , David? --- No problem. A. instructions B. inventions C. invitations D. interviews 4. Its getting colder and colder. I suggest some warm clothes. A. buy B. to buy C. bought D. buying 5. The house two bedrooms, one kitchen and one living room. A. is made of B. is made from C. is made into D. is made up of 6. she knew all her friends would be there, she didnt want to go, yet. A. Even if B. Because C. As soon as D. However 7. If you the book, youll find something surprising. A. turn down B. turn on C. turn off D. turn over 8. There are many old people are taking a walk in the park. A. those B. which C. that D. whom 9. Thought is the key opens the doors of the world. A. why B. where C. which D. who10. Jamie is a young cook wants to improve school dinners. A. who B. whose C. whom D. which二、完形填空 Have you ever heard of the satellite(卫星) called the Early Bird, which was built by a group of scientists from 14 countries? Up till now dozens of satellites have been put into 11 and they help people in many ways. You can speak to people on the other side of the world over the telephone with the help of a satellite. They can help to take the photos of the earth and other 12 . Some pictures taken by the satellites show us the right places where different metals can be 13 . They can also tell the difference between healthy plants and poor ones. This is a great 14 to the scientists who work in the forests and in agriculture(农业). Satellites are quite useful in our daily life. For example, satellites for 15 are used to send radio and TV programs from one part of the world to another. It is the satellites that make our world seem 16 . A number of research stations have been set up to study the outer space. In the past, it was difficult for the scientists to get a 17 picture of space because of the dusty air, 18 satellites make it easier. They are being used more and more to 19 information about space just like 20 between space and men.11. A. room B. earth C. space D. air12. A. moon B. stars C. sun D. sky13. A. found B. made C. lost D. put14. A. discovery B. wonder C. interest D. help15. A. weather B. communication C. computer D. traveling16. A. bigger B. longer C. smaller D. shorter17. A. clean B. clear C. complete D. fresh18. A. but B. when C. and D. so19. A. collect B. make C. hide D. know20. A. lines B. traffic C. holes D. bridges三、阅读理解A What should you take in with you when you take an exam? Pen, pencil, eraser, ruler…, and dont forget a bottle of water! According to a study at the British Psychological( 心理学的) Society Annual Conference held in London, students who bring water into exams may improve their grades by up to 10 percent. Scientists at the University of East London and the University of Westminster, UK, did a study on 447 students. The students were studying for different degrees(学历) at the University of East London. Only 25 percent of them entered the exam hall with something to drink. Scientists then compared their exam results with their normal schoolwork grades. They found that all those who had brought drinks with them got better grades by between 2 and 10 percent. It is unclear why drinking water improves exam results. But scientists say having enough water in our bodies and not feeling thirsty could have a helpful effect on our brains. Drinking water may also cut down on anxiety(焦虑), which has a bad effect on exam performances, according to Chris Pawson, PhD, of the University of East London. "Whatever the explanation, it is clear that students should try hard to stay hydrated(含水的) with water during exams," he said. So next time, when you are going to have a big exam, try bringing a bottle of water with you. Who knows—it may help you pass the exam!21. How much may the students improve their grades most if they bring water into exams? A. By 2%. B. By 8%. C. By 10%. D. By 25%.22. How many students in the study got better grades? A. About 112 students who brought drinks or water into their exams. B. All the 447 students who come from the University of East London. C. About 300 students who took part in the study. D. About 10 percent of the students who studied different subjects.23. The underlined phrase "cut down on" probably means . A. inc。