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(裝置) 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(計(jì)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(精確的). There are also new uses for the GPS. Perhaps they will become like       . Everyone will have one and you will never be lost again.
小題1:
A．whereB．what C．whoD．how
小題2:
A．ship B．carC．trainD．plane
小題3:
A．watchB．ring C．clockD．GPS
小題4:
A．a(chǎn)dviseB．know C．representD．speak
小題5:
A．radioB．TVC．robotD．machine
小題6:
A．room B．officeC．road D．mobile phone
小題7:
A．partsB．maps C．videoD．music
小題8:
A．studioB．teenager C．busD．street
小題9:
A．fiveB．four C．threeD．two
小題10:
A．sender B．receiver C．Internet D．system
小題11:
A．a(chǎn)nd B．then C．butD．or
小題12:
A．control B．a(chǎn)chieveC．a(chǎn)llowD．imagine
小題13:
A．expensiveB．specialC．newD．common
小題14:
A．cheaperB．easierC．more expensiveD．bigger
小題15:
A．computersB．robotsC．satellitesD．watches

小題1:A
小題2:B
小題3:D
小題4:B
小題5:A
小題6:D
小題7:B
小題8:D
小題9:C
小題10:B
小題11:D
小題12:A
小題13:D
小題14:A
小題15:D
試題分析：這篇文章講了GPS。GPS能夠定位你的方位，所以能讓你不再 迷路。它也是一個(gè)接受器，接收衛(wèi)星發(fā)回的信號(hào)。文章還分析了GPS的構(gòu)成以及發(fā)展趨勢(shì)。
小題1:考查疑問(wèn)詞及對(duì)語(yǔ)境的理解。句意：你不知道你在哪。A.where在哪；B. what什么；C. who水；D. how怎樣。表示地方，用where。故選A。
小題2:考查名詞及對(duì)語(yǔ)境的理解。句意：這時(shí)你的車(chē)壞了。A.ship船；B. car汽車(chē)；C. train火車(chē)；D. plane飛機(jī)。由上句：You are driving a car，可知，你開(kāi)的是車(chē)，故選B。
小題3:考查名詞及對(duì)語(yǔ)境的理解。句意：下一次，隨身帶一個(gè)導(dǎo)航儀。A.watch手表；B. ring戒指；C. clock   鐘表；D.GPS導(dǎo)航系統(tǒng)。根據(jù)下文：. A GPS cannot start your car, 故選D。
小題4:考查動(dòng)詞及對(duì)語(yǔ)境的理解。 句意：至少你會(huì)知道你在哪。A.advise建議；B. know知道，了解；C. represent代表；D. speak說(shuō)。導(dǎo)航儀能讓你知道方位，故選B。
小題5:考查名詞及對(duì)語(yǔ)境的理解。句意；GPS是一個(gè)小的收音機(jī)接收器。.A.radio收音機(jī)；B. TV電視；C. robot 機(jī)器人；D. machine機(jī)器。根據(jù)receiver可知，GPS有接收功能，只有收音機(jī)有接收功能，功能最接近。故選A。
小題6:考查名詞及對(duì)語(yǔ)境的理解。句意：在口袋里我們有時(shí)會(huì)放入一只表或者一個(gè)手機(jī)。A.room房間B. office辦公室C. road道路D. mobile phone手機(jī),根據(jù)現(xiàn)實(shí)情況，口袋里放的是手機(jī)。故選D。
小題7:考查名詞及對(duì)語(yǔ)境的理解。句意：這些裝置有時(shí)有電子地圖。A.parts部分；B. maps   地圖；C. video 錄像；D.music音樂(lè)。根據(jù)：so you know where you are.可知帶有的是地圖，故選B。
小題8:考查名詞及對(duì)語(yǔ)境的理解。句意：例如在一個(gè)城市里他們能告訴你街道的名稱(chēng)。A.studio工作室；B. teenager青少年；C. bus公交車(chē)；D. street街道。根據(jù)導(dǎo)航儀的功能，故選D。
小題9:考查數(shù)詞及對(duì)語(yǔ)境的理解。句意：導(dǎo)航儀包含三個(gè)部分。A. five五；B. four四；C. three三；D. two二，根據(jù)The third part of the system ，故選C。
小題10:考查名詞及對(duì)語(yǔ)境的理解。句意：第一部分是一個(gè)接收器。A. sender發(fā)送者；B. receiver接收者；C. Internet電腦；D. system系統(tǒng)。根據(jù)第五題可知， 故選B。
小題11:考查連詞及對(duì)語(yǔ)境的理解。句意：你能把他拿在手中，也能固定在車(chē)上，或飛機(jī)上。A.and  和，又；B. then然后；C. but但是 ；D. or 或者。either....or...兩者選其一，故選D。
小題12:考查動(dòng)詞及對(duì)語(yǔ)境的理解。句意：他們控制衛(wèi)星，確保衛(wèi)星正常運(yùn)行。A.control控制;B. achieve達(dá)到;C. allow允許;D.imagine想象。根據(jù)衛(wèi)星的作用，是用來(lái)控制的，故選A.
小題13:考查形容詞及對(duì)語(yǔ)境的理解。句意：將來(lái)GPS將會(huì)像手機(jī)一樣普及。A.expensive貴的; B. special特殊的;C. new新的;D. common普通的。根據(jù)現(xiàn)實(shí)中手機(jī)的特點(diǎn)，故選D。
小題14:考查形容詞及對(duì)語(yǔ)境的理解.句意:他們會(huì)變得越來(lái)越便宜，也越來(lái)越精確。A. cheaper更便宜；B. easier更容易；C. more expensive更貴的；D. bigger更大的。根據(jù)上一句，會(huì)像手機(jī)一樣普及，可知是便宜，故選A。
小題15:考查名詞及對(duì)語(yǔ)境的理解。句意：GPS可能會(huì)變得像手表一樣A.computers電腦；B. robots機(jī)器人；C. satellites   衛(wèi)星； D. watches手表。根據(jù)：Everyone will have one and you will never be lost again.可知，這是手表的特性，故選D。
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