Unit 3 The Earth检测题 (时间：60分钟；满分：100分) Ⅰ.单项选择（每小题1分，共10分）11. Benny saw three ______ climbing the walls. A. thiefs B. thief C. thieves D. thieve12. —Tom, what are those? —They are________. A. deers B. a deer C. deer D. deeres13. There ____ a book and two pens on the desk. A. is B. are C. be D. /14. The boy is thirsty, and he would like _______.A. a cup of tea B. a bowl of rice C. a box of chocolate D. a piece of bread15. Maths _____ my favourite subject. A. is B. am C. are D. be16. It’s important _______ us to study hard.A. to B. for C. on D. with17. There are many animals on Earth. Some live _____ the land. Some live ____ the water. A. under; on B. in; under C. on; under D. under; in18. We must stop _____ the animals! A. kill B. to kill C. killed D. killing19. Don’t ____ rubbish into the river! A. go B. throw C. pull D. push20. Forests are very important. They provide us _____ a lot of things.A. of B. to C. with D. forⅢ.完形填空（每小题1分，共10分）If a snake bites you, take a photo with your mobile phone! It may save your life. This is the surprising 21 of a British cook.One day Henry Jackson was working in a restaurant kitchen. He picked up a dish from the table, and 22 a snake appeared...and bit him on the hand.A few days earlier, the snake came to the 23 from Asia in a box of bananas. It climbed out of the box and 24 under the dish.“I went to try to pick it up and it bit me again. I threw it 25 the kitchen, and it landed in the fridge. So I closed the door,” Mr Jackson said.Anyway, Mr Jackson stayed 26 and he took a photo of the snake with his mobile phone. Soon his 27 began to ache and he went to hospital. Then his chest began to hurt. Doctors couldn’t say what was wrong 28 they didn’t know what kind of snake it was.Then Mr Jackson remembered his mobile phone photo. The doctors 29 it to London Zoo. When they knew the kind of snake, they could give Mr Jackson the right medicine, and he left hospital the next day.“So my advice is this：If a snake bites you，pick up your phone. Take 30 photo first and then show the photo to the doctors,” suggests Mr Jackson.“Oh, and if the snake doesn’t smile for the photo, don’t worry！”21. A. chance B. advice C. excuse D. business22. A. suddenly B. nearly C. especially D. fortunately23. A. garden B. hospital C. restaurant D. school24. A. hung B. hid C. jumped D. ran25. A. under B. into C. towards D. across26. A. cool B. noisy C. pleased D. afraid27. A. foot B. leg C. hand D. mouth28. A. but B. though C. so D. because29. A. wrote B. sent C. sold D. taught30. A. his B. her C. its D. theirⅣ.阅读理解（每小题2分，共28分）AImagine the situation. You are driving alone in a desert or on a mountain. You have no idea where you are. You passed the last house two hours ago. Then your car breaks down. It is night and it is cold. You have no mobile phone. What do you do? Well, next time take a GPS with you. This invention may be able to help you. It is a device (装置) which uses satellites (卫星) to find the user’s position (位置).It can find your position to within 20 metres. A GPS cannot start your car, but at least you will know where you are.GPS, which means Global Positioning System, is a small radio receiver. It looks like a mobile phone. You can hold it in your hand, or put in your pocket. It is sometimes put into a watch or a telephone. We also find GPS devices in cars, planes, or boats. Some of these devices have electronic maps, so you know where you are. For example, in a city they can tell you the name of the street.There are three parts to the Global Positioning System. The first part is the receiver. You can hold it in your hand, or have it fixed into your car, plane, etc. The second part is a group of satellites orbiting the Earth. The receiver contacts at least four of the satellites and calculates (计算) its position. The third part of the system is a network of ground stations. They are all over the world. They control the satellites and make sure they are working well.Some people think that in the future the GPS will be as common as the mobile. They are becoming cheaper and more and more accurate (精确的）.There are also new uses for the GPS. Perhaps they will become like watches. Everyone will have one and you will never be lost again.31. According to the passage, with the help of the GPS, people ______________.A. can’t be lost in a new cityB. can’t find their way in different countriesC. can learn about the cultu。