With the development of modern science and technology，the functions of cellphones have changed greatly.【小题1】 The only difference may be that they fit in your pocket and you pay by the minute to use them.Some of the things a cellphone can do for you will be available this year：

Surf at speed

Cellphones that let you use the Web have been around for years.So，what’s new？ Well，faster thirdgeneration (3G) networks that let you surf at anywhere.【小题2】 Possible choices are from IJG Electronics VX 8000 and Motorola V1150.Listen as you go.

【小题3】 There is no doubt that it is about to change.Sony Ericsson’s new W8001 can hold around 150 songs in its 500 MB memory.And Samsung’s SPHV5400 even comes with a 1.5GB hard drive.Mobile phones may eventually replace mini MP3 players，especially for teens.

Camera cellphones are not new either but most of them have limitations： around 1­megapixel (百万像素).However new technology has made 2­megapixel units more common，and 3­megapixel units are showing up soon.Some 2­megapixel models，like Sony Ericsson’s K7501，offer limited zoom and focus controls.【小题4】 Portable TV.

You say you like “watching TV”？ That’s what Samsung MMA700 wants to give you.The new model lets users watch popular TV programmes for a fee.Other choices are Nokia’s 6620， Sanyo’s MM740 and NEC’s N940.【小题5】

The above are just a handful of what you’ll see in the coming months.Further down the road，your mobile phone may play a host of other roles，such as mobile credit card，position locator and so on.So what is there that a cellphone can’t do？

Bad Things About Cell Phones in School

Giving your schoolchild a cell phone has a very positive effect. 【小题1】 However, at school especially in the classroom, cell phones cause a lot of problems.

The Internet capabilities (联网功能) of phones will make students absent from their tasks. 【小题2】 In addition to sending text messages, smartphones have email and Internet capabilities. All of these features will distract (使分心) children from their tasks at hand.

【小题3】 The most common means by which the whole class distraction happens is when a cell phone rings during the middle of a class, attracting students’ attention towards the noise. A student with a cell phone may also encourage others to play the game on his cell phone or share information that comes up on the Internet.

The use of phones may contribute to the students’cheating in the exams. Students can take advantage of cell phones’ Internet capabilities to look for answers to questions for tests for which they haven’t studied. Having a palm-sized computer may give students the chance to cheat in exams. 【小题4】

Using a phone may reduce children’s social behavior. If a student has a cell phone, particularly one with an Internet connection, it must reduce his necessity to socially communicate with others. 【小题5】

   Smartphones have been blamed for everything from taking drivers’attention from driving to keeping people on the sofa scrolling (滚屏) videos. But the smartphone that seems to be everywhere could just easily increase physical activity if it pushes its owner’s buttons in the right way.

New research shows that making social connections (人际关系) through activity-tracking apps gets people to move more. And another study on the “Pokemon Go” phenomenon shows that the smartphone game got players to take thousands more steps than usual. Together, the studies show the potential (潜在性) of smartphones to push a range of people to be more active.

People who linked with friends on the activity-tracking app increase their steps by 400 a day on average, compared with people who made no social connections, according to Tim Althoff and two other computer scientists at Stanford University. Such opinions show the possibilities of smartphones and games to help with one of the most stubborn public health problems — that even people who want to be active have trouble staying active.

An NBA video game, for example, will give players extra powers in the game if they reach a step goal in real life. The app “Zomies, Run!” uses audio stories to push people to run more or run faster.

Still, there is room for growth: Only about 4% of all health apps use “gamification”, such as point- scoring or competition, according to a study published in October in BMJ Open. “Gamification is actually quite closely linked with behavior change techniques,” says Dr. Elizabeth Ann Edwards, the study’s lead author.

In the last thirty years, the Internet 【小题1】 (grow) rapidly. In 1983, there were only 200 computers 【小题2】 (connect) to the Internet; now there are around 50 million and this growth is 【小题3】(clear) going to continue.

Some experts are pessimistic about the future. One worry is crime in cyberspace. Even now, young 【小题4】 (hacker) can get into the computers of banks and governments. In the future, terrorists may “attack” the world’s computers, cause chaos, 【小题5】 make planes and trains crash.

However, many people are 【小题6】 (optimism) about the future of the Internet. Already, users can buy books, find out about holiday offers, book tickets, and get all sorts 【小题7】 information from the Internet.

“In the next few years,” says Angela Rossetto of Cyberia magazine, “【小题8】 is clear that we are going to see a huge 【小题9】 (grow) in shopping on the Internet.” She also believes that, in the future, we will get entertainment from the Net and that television will probably 【小题10】 (appear). The mail service may also disappear with the increasing use of e-mail.