Advertisement is omnipresent in our modern society. It seems wherever we go, such small ads will greet our eyes: the supermarket, the subways, the stop sighs, the walls of public buildings, the garbage can
posting your own pictures on the internet is dangerous. The internet can be accessed by anyone, so therefore your personal information might leak out. Anyone can look and use your picture for any purpose
worse, it is bad for our health. Some students are near-sighted because they play computer games too a word, we should use the internet in a proper way.写得不好,仅供参考啊!