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  3. Most smart phones allow you to run location-sharing software that uses the phone’ s GPS capability to let friends and family kno

Most smart phones allow you to run location-sharing software that uses the phone’ s GPS capability to let friends and family kno

admin2019-03-13  41
问题    Most smart phones allow you to run location-sharing software that uses the phone’ s GPS capability to let friends and family know your exact location. There are lots of great uses for this technology. 【B1】______So make sure you’ re permitted to use an app or service, and pay attention to how you are using it. Here’ re some important points you may find helpful.
   Choose what’ s best for you. Some location-sharing services are games that let you give a shout-out when you’ ve turned up at a particular spot.【B2】______Still others continue to share your location until you change the setting. Be sure you know exactly how your service shares your location.
   Know who your friends are.【B3】______This means people can search to see if you’ re online and add you as a friend. It’ s important to remember that sharing your location with people you’ ve never met in real life is risky, so you should carefully manage friend requests and share your location only with people you know and trust.
   【B4】______Some services automatically stop sending your location after a period of time, but others will send it forever—until you stop it. Review your contact list periodically and delete anyone to whom you no longer feel comfortable revealing your location.
   Update parents. Location-based services are a great way for teens to let parents know where they are without having to call or text.【B5】______If you’ re heading home late at night, you can also use a service like Glympse to share your location as you drive, so they will know if you have car trouble or get stuck in traffic.
[A]Check back often.
[B] Keep sending your location.
[C]However, these services are not for all children.
[D]With its help, you can easily share your location with them.
[E]Check-ins ease worries so they don’ t have to follow your every move.
[F] Others show where you are all the time or for a period of time you set.
[G]Some location services operate like Facebook, where you invite and accept friends.
【B2】
选项
答案F
解析 第二段说明了位置共享的三种情况。上一句提到“Some location-sharing services”，后一句提到了“Still others continue to share your location”，可推测此处应还有一种装置。故选F。
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