What has been the world\'s greatest invention and why?

Happy Tuesday, Mr. [이름]! I appreciate your efforts in accomplishing your homework. I also think smart phones are a revolutionary invention.

It would probably evolve into something better the next coming years. Anyway, I hope you have an awesome day. See you in class! ^_^

~T.Avery

I can definitely say that smart phone is the greatest invention because we have to bring a lot of stuffs such as camera, MP3 player and pager or mobile phone before it invented.

>> I can definitely say that smart phone is the greatest invention because we have to bring a lot of stuff such as camera, MP3 player and pager or mobile phone before it was invented.

I had never thought Apple company released the smart phone with out dial button on the phone.

>> I had never thought the Apple company would release the smart phone without the dial buttons.

Touch panel is not amazing thing anymore these days.

>> Touch panel is not an amazing thing anymore these days.

OR>> Nowadays, touch panel is no longer that fascinating.

To use the smart phone is the most important things in daily life.

>> The smart phone is one of the most important things in our daily life.

Most people start their day with the smart phone.

>> CORRECT

I don\'t think we can live without the smart phone because we can do anything with it.

>> CORRECT
We can control cars, electrical goods and making a video call around the world.

>> We can control cars, electrical goods and make a video call around the world.

The first thing I consider when I purchase the electrical goods is if it can be controlled by the mobile phone.

>> CORRECT

However, the smart phone makes a lot of social problems like addiction of video game.

>> However, the smart phone makes a lot of social problems like addiction to video games.

We look like a slave of the smart phone because we can\'t do anything without it.

>> CORRECT

In conclusion, the invention of smart phone is like revolution but it has adverse effects.

>> CORRECT