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15．Have you ever lost your car on a parking lot？It happens．You park and go shopping．When you get back，you fail to find your car．Then you press the button on your car keys so the alarm goes off．It can be frustrating，especially on a hot，sunny day．No，you don't need to install（安裝） an expensive GPS system to keep track of your car．That's too expensive．But is there a way to track your car without spending money？Yes，now there is!
A California-based startup company was able to make this a reality．They created a small device（裝置） that works with your smartphone，and it could be exactly what you're looking for!
What is it？
It's called TrackR．It is a state-of-the-art tracking device the size of a quarter．It's changing the way we keep track of the important things in our lives．
How Does it Work？
It's easy!Install the free TrackR app on your smartphone，connect the app to your device and you're ready to go!Simply attach TrackR to whatever you want to keep track of．It only takes 5 minutes or less．You can attach it to your keys，briefcase，wallet，and anything else you don't want to lose．Then use the TrackR app to locate your missing belongings in seconds．Forget expensive GPS systems or tracking services．TrackR is your VIP when you need to take cars of more important things in life．
How Much is This Thing Going To Cost Me？
You're probably thinking that this device is very expensive…False!TrackR only costs $29!That's a small price to pay for peace of mind，isn't it？
Where can I buy one？
You can buy it directly from the company's website．They ship worldwide and you'll receive your TrackR within a week．
 
19．TrackR can be used toC．
A．replace GPS system
B．save money and time
C．find missing belongings
D．connect the app with the phone
20．From the passage we know TrackR isB．
A．hard to install
B．available online
C．free of charge
D．big in size
21．What is the writhing purpose of the passage？D
A．To show how TrackR words
B．To make TrackR well-known
C．To introduce the usage of TrackR
D．To persuade readers to buy TrackR．

分析 本文是一篇廣告布告類閱讀，屬于廣告，本文主要介紹了TrackR的功能，使用方法以及價錢，購買方式，目的是勸說讀者購買TrackR．

解答 19．C．細節(jié)理解題．根據It's called TrackR．It is a state-of-the-art tracking device the size of a quarter．It's changing the way we keep track of the important things in our lives．以及上文內容可知，TrackR可以幫你尋找丟失的物品．故選C．
20．B．細節(jié)理解題．根據It's easy!Install the free TrackR app on your smartphone，connect the app to your device and you're ready to go!Simply attach TrackR to whatever you want to keep track of．可知，TrackR可以通過手機應用在線使用．故選B．
21．D．推理判斷題．根據文章內容可知，本文主要介紹了TrackR的功能，使用方法以及價錢，購買方式，目的是勸說讀者購買TrackR．故選D．

點評 本文是一篇廣告布告類閱讀，題目涉及多道主旨大意題，細節(jié)理解題，推理判斷題．做題時學生應仔細閱讀原文，把握文章主要內容，聯系文章上下文內容并結合所給選項含義，從中選出正確答案，一定要做到有理有據，切忌胡亂猜測．

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