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You mustn't drive a car on the road you are 18 years old.
A.because B.when C.unless D.if
九年级英语单选题中等难度题查看答案及解析
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You have to be 18 years before you _________ to drive a car.
A. are allowed B .are C. allowed D. allow
九年级英语单项填空中等难度题查看答案及解析
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Imagine the situation. You are driving a car along a desert or on a mountain. You have no idea ________ you are. You passed the last house two hours ago. Then your breaks down. It is night and it is cold. You have no mobile phone. What do you do? Well, next time take a ________with you. This invention may be able to help you. It is a device(装置) which uses satellites 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 ________ where you are.
GPS, which means Global Positioning System, is a small ________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 ________. We also find GPS devices in cars, planes, or boats. Some of these devices have electronic ________, so you know where you are. For example, in a city they can tell you the name of the ________.
There are ________parts to the Global Positioning System. The first part is the ________. You can either hold it in your hand ________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 ________ the satellites and make sure they are working well.
Some people think that in the future the GPS will be as ________as the mobile. They are becoming ________and more and more accurate(精确的). The
re are also new uses for the GPS. Perhaps they will become like ________. Everyone will have one and you will never be lost again.1.A.where B. what C. who D. how
2.A.ship B. car C. train D. plane
3.A.watch B. ring C. clock D.GPS
4.A.advise B. know C. represent D. speak
5.A.radio B. TV C. robot D. machine
6.A.room B. office C. road D. mobile phone
7.A.parts B. maps C. video D. music
8.A.studio B. teenager C. bus D. street
9.A. five B. four C. three D. two
10.A. sender B. receiver C. Internet D. system
11.A.and B. then C. but D. or
12.A.control B. achieve C. allow D. imagine
13.A.expensive B. special C. new D. common
14.A. cheaper B. easier C. more expensive D. bigger
15.A.computers B. robots C. satellites D. watches
九年级英语完型填空中等难度题查看答案及解析
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—There are so many cars on the road. You should obey the traffic rules and go ___the zebra.
—OK. I will follow your advice.
A. cross B. across C. through D, around
九年级英语单项填空简单题查看答案及解析
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--Drivers in England drive cars on the left of the roads.
-- .
A. So Australian drivers are. B. So are Australian drivers.
C. So do Australian drivers. D. So Australian drivers do.
九年级英语单项填空中等难度题查看答案及解析
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Teenagers have to be 18 years old before they ________ to drive a car.
A. are allowed B. are asked C. are considered
九年级英语单选题简单题查看答案及解析
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Teenagers have to be 18 years old before they to drive a car.
A. are allowed B. allowed C. will be allowed D. allow
九年级英语单选题中等难度题查看答案及解析
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（题文）（2017年山东青岛）Teenagers have to be 18 years old before they_____ to drive a car.
A. are allowed B. . will be allowed C. . allow
九年级英语单选题中等难度题查看答案及解析
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（2017·山东青岛· 9）Teenagers have to be 18 years old before they ________ to drive a car.
A. are allowed B. allowed C. will be allowed D. allow
九年级英语单选题中等难度题查看答案及解析
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Teenagers have to be 18 years old before they ______ to drive a car.
A. are allowed B. will be allowed C. allowed D. allow
九年级英语单选题困难题查看答案及解析
re are also new uses for the GPS. Perhaps they will become like ________. Everyone will have one and you will never be lost again.