If it seems like all your friends have smartphones,you may be on to something. A new report by Common Sense Media, which reports on technology and media for children, found that by the age of 11, more than half of kids in the US have their own smartphone. By age 12, more than two-thirds do, and by 14, teens are just as likely as adults to own a smartphone. Some kids start much younger. Nearly 20% of 8-year-olds have their own smartphone!

Well, I study the effects of media and technology on kids, and I’m here to say that there is no single right answer to this question. The best I can offer is this: When both you and your parents feel the time is right.

Here are some points to consider to help you and your parents make this decision.

Be responsible. Have you shown that you are generally responsible? Do you understand the value of money, and can you save up to buy things you want?

Keep safe. Do you travel to or from school or after-school activities without an adult? This is when phones often go from a “want” to a “need”. Sometimes parents report that they feel better knowing they can reach their children directly, and that their kids can reach them, too.

Be careful. Do you treat your friends with kindness and respect? Do you know the fact that once something goes out onto the web, it can never truly be deleted (删除)?

When you have a smartphone, your parents are the No. I most important influence in your life. If parents use their phones all day, guess what? Their children probably will be like that, too.However, if parents have smartphone habits like putting the phone away during meals, that will go a long way toward helping kids develop the same habits.

Public speaking undoes the best of us. There is fear that, if you fail to prepare adequately, 【小题1】. Fumbles (笨嘴拙舌讲话) like these can cost you that desired promotion or a profitable new partnership. Its not always fair, but people are judged on their public-speaking skills. The good news, however, is that improvement is possible. Below are a few basic tips.

Language is the major component a speaker needs to focus on. 【小题2】. Say “use” instead of “utilize”, and “detailed” instead of “granular”. Try not to refer to your growth plan as a “global recovery plan”. Language can perform its effectiveness by the speaker restating main points, providing a special message or encouraging audience to ask questions. 【小题3】. Good ones involve open palms, joined fingertips, or spread arms.

While listening, audience have a tendency to position themselves into the situation created. 【小题4】. They could be enjoyable or defeated ones. For instance, tell your listeners about a time you got it wrong. Let them learn from your mistakes.

【小题5】. Adopting pictures, diagrams or catalogues (目录) can help make your presentation impressive. Include a brief clip from a well-known movie to entertain your audience and drive the point home. But bear in mind — don’t let them distract from you.

Tencent announced yesterday that it would limit the daily time for youngsters to play its popular King of Glory game after parents in Shanghai and other areas complained their children had become addicted to playing it.

"From tomorrow，children younger than 12 will only be allowed to play the game for a maximum（最大值）of one hour a day，and after 9 pm，they will be banned from logging in it，"said Tencent."Those older than 12 will be able to play a maximum of two hours a day."

The game system will remind players the time they have been playing and young players will be forced to log out when the time is up.

Tencent claimed these were the strictest measures in China's game industry to prevent addiction and the company expected they would ease parents' anxiety.

The company also said it had updated its system for parents to keep tabs on their children using its games.

Since February，parents can receive messages when children log in and spend money on the game after they connect children's game accounts with their mobile phone numbers.

"Now, parents can connect phones, tablets or computers that their children use to play games, so that they can keep an eye on the children even if they have several game accounts," Tencent said.

Song Zhe, a father of a Shanghai high school student, welcomed the measures but was not sure if they would be sufficiently effective." I like the system that could lock up the devices as children can register many accounts," he said, "but children are so clever that they can always think out counter measures."