《英文天天写》是沪江部落一档写作类节目，其目的在于提升大家的英语写作能力。每期节目主持人都会给出一个话题，积极参加的童鞋还会得到主持人的专业点评哦！想提高英语写作的童鞋千万不要错过哦！去沪江部落订阅本节目！

  

话题：

Writing: imagine a scenario or express your opinion
GPS (Global Positioning System)
The Global Positioning System, more often refered to as GPS, is a system of satellites providing location information. Where is the GPS used? How does it affect navigation?
This week's topic: They turned on their GPS... (90-110 words)

Suggestions:
1) turning off GPS in a smart phone to extend battery life
2) using GPS to search for an alternate route when encountering a detour
3) relying too much on the GPS
4) how GPS works
5) Instead of writing a scenario, feel free to comment on the story below.

范例1：

“Don't worry about it. I have your GPS co-ordinates from your last location. I'll check up on the area and look for buildings or other structures in the vicinity. Let's call it a night. I'll see to it you get home safely,” Doug told his partner. He kept monitoring his partner's location while going through the computer system to search for information about the location at which his partner had to abort the tracking mission. That area where the target vehicle turned off-road was remote, off a stretch of highway without traffic cameras.

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