The hard-working blacksmith(铁匠)Jones used to work all day in his shop and so hard-working was he that at times he would make the sparks(火星) fly from his hammer.

The son of Mr. Smith, a1neighbor, used to come to see the blacksmith every day and for hours and hours he would enjoy himself 2 how the blacksmith worked.

"Young man, why don't you 3your hand to learn to make shoe tacks(鞋钉), even though it is only to pass the 4?"said the blacksmith. "Who, 5, one day, it may be of use to you. "

The boy began to see what he could do. After a little 6 he found that he was becoming very7and soon he was making some of the finest tacks.

Old Mr. Smith died, and because of the war, the son8all his goods. He had to leave home and was forced to live in a village in another country. In this village, there were large numbers of shoemakers who were spending a lot of money on tacks for their shoes, and sometimes9when they paid high prices they were not always able to10 what they wanted, because in that part of the country there was a great 11 for tacks for soldiers' shoes.

The young Mr. Smith, who was finding it difficult to earn his daily bread, remembered that once upon a time he had learned the 12 of making tacks and had the sudden idea of making a bargain (交易) with the 13. He told them that he would make the tacks if they would 14 him to get settled (安顿)in the work shop. The shoemakers were only too glad of the bargain. And soon, young Mr. Smith found that he was making the finest tacks in the village.

"How 15 it seems, "he said with a smile, "Even making tacks can bring me good luck. My trade is more useful to me than all my former (从前的) riches. "

For many students, joining social media "circles" is now more important than making new friends in real life. And it's easy. If you have a mobile phone, you can download many apps such as weibo, QQ and WeChat.

"I love to check my friends' updates. I also enjoy news and jokes shared on social media," said Wang Wei, 14, from a middle school in Shenzhen. While enjoying these, Wang distances himself from real life. "I love playing the plane-shooting game on WeChat, but have no interest in playing chess with my classmates," said Wang.

Deng Yunyun, 14, from Xuhui Middle School in

Shanghai, said that social media has influenced their normal life. Last month, his school held a basketball match, and a student hurt his leg. Instead of giving him some help, students were busy updating their blogs about the accident. "I think they need to learn to keep a balance between their real life and online life, and what worries parents and teachers a lot is safety," said Deng.

"Many students are happy to tell 'their friends' about their interest on social media. And this could bring them danger," said Miss Wang, a teacher from Shenzhen. "For example, WeChat's shake-shake function allows users to connect to other users nearby. Be careful. Do not use the location function at any moment; do not give your name, and do not post the photos of your community."