it's my english CET4 examination's direction,please help me

"Why am i going to school if my phone already knows everything?" When i saw the sentence, I remembered when I took my phone everywhere. I was thought I couldn't be like this anymore. So I was changed myself. And really to do did something.
I think there have are something good parts of the internet. You can check it anywhere, it's so convenient, and you don't need buy some book,then you can read it on the phone. If you don't know something, just ask the phone. I think it's both of a good thing and bad thing. It will take away the fun of finding knowledge from the books, you won't read books anymore, and we won't talk to each other face to face, we will just say hi on the phone.
On the vacation, we will be playing phone games instead of sports. I think it's really important of to do something. The phone is just a machine of to help us, not instead of being our minds.
Remember you have a mind, you use your eyes to look at the paper of the books, you hear the songs from the of nature, so don't let the internet instead of be your mind.

Your English is pretty good :) Keep practicing!