1.长时间使用手机危害身体健康，特别是视力；
2.依赖打电话、发短信，学生与亲友间很少面对面交流；
3.上课发短信、看视频，学生成绩快速下降；
4.沉迷于玩手机，学生没有时间进行体育锻炼；
5.家长和老师应该适当限制学生使用手机。
注意:
1.可以适当增加细节，以使行文连贯；
2.词数：80左右。
The negative effects of using cellphones on students
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Rescue in a Bottle
Curtis Whitson had rafted (v.乘筏) down the Arroyo Seco, a river in central California, several times before.
This year, Curtis Whitson knew the water-fall was coming. He figured he would get out of his raft into the shallow water, get down the rocks along ropes on either side of the falls, and continue on his way, as he had on a previous trip.
But this year was different. Heavy snow and spring rains had turned the usually manageable falls into something fierce. And this year, instead of his friends, Whitson’s companions were his girlfriend, Krystal Ramirez, and his 13-year-old son, Hunter. As the three of them approached the falls late in the afternoon of the third day of their camping trip, Whitson could tell from the increasing roar of water in the narrowing canyon(峡谷) that they were in serious trouble. There was no way they’d be able to get down the rocks as planned.
“The water was just roaring through there with tremendous force,” recalls Whitson, 45.
They had no smart phone service, and they hadn’t seen a single person in the past three days. And Whitson knew that they’d be sharing the ground there with rattlesnakes and mountain lions.
As he was thinking what to do, Whitson hit on a bit of luck---he heard voices coming from the other side of the falls. He yelled, but the sound of the rushing water drowned him out.
“We have to get these people a message,” Whitson thought.
He grabbed a stick and pulled out his pocketknife to carve “Help” in it. Then he tied a rope to it so the people would know it wasn’t just any stick. He tried throwing it over the falls, but it floated away in the wrong direction.
“We’ve got to do something!” Whitson yelled to his son. “Have we got anything else?”
Then he spotted his water bottle. Whitson grabbed it and carved “Help!”on it. Ramirez also reminded him that he had a pen and paper in his backpack.
Whitson knew it was a slim hope. But he wrote “6-15 19:00 We are stuck here@ the waterfall. Get help please” and pushed the note into the bottle. This time, his throw over the waterfall was perfect.
“All right, that’s all we can do,” Whitson told Hunter.
注意：
1. 所续写短文的词数应为150左右；
2. 续写部分分为两段，每段开头语已为你写好；
Paragraph 1:
It took 30 minutes to get back upstream to the beach where they’d had lunch.
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Paragraph 2:
The next morning, the helicopter returned.
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