在下面一段文字横线处补写恰当的语句，使整段文字语意完整连贯，内容贴切，逻辑严密。每处不超过15个字。

    互联网是一把双刃剑，用得好，它是阿里巴巴的宝库，里面有取之不尽的宝物；用不好，它是潘多拉的魔盒，____。正因为如此，我们既要享用互联网，____。网络安全与规范文明的网络环境，则是网友必须遵守的底线。当然，任何文明规范的治理，____。只有当法律不断完善，依法治网有了更科学的依据，网民利益才能更有保障，互联网产业才能健康发展。

阅读下面短文，根据短文内容，从A,B,C三个选项中选出可以填入空白处的正确答案。

A

    A famous symbol in American culture is a cartoon animal—Mickey Mouse. Mickey first 1 in a cartoon in New York in 1928. Walt Disney was the father of Mickey. He made lots of cartoons with Mickey. Many people around the world love the mouse with two 2 ears. He was so popular because he was like a common man, but he always tried to face any danger and solve the problems all by himself. In Disney's early films, Mickey was 3,he lost his house and girlfriend, Minnie. 4,he never gave up his efforts and always won at last. Most people want to be like him. Now Mickey Mouse is still one of the most popular 5 characters in the world.

CACBA

春天，一位坐火车的旅行者，当到达目的地时，旅行袋内装满了他一路上脱下来暂时不穿的衣服。此人的旅行路线可能是（      ）