Cyber security has always been a serious issue as the internet industry is ever growing.Nowadays,people can easily connect to the Internet with a simple click of a mouse.But the global network can be easily destroyed by a single leak.The world is facing a difficult situation in keeping web security.
Currently,there are no unified international rules for maintaining internet security.China has called for unified international rules against internet crime.Last year China(and some other countries)handed in a draft Code of Conduct on Information Security to the UN.
World leaders and experts discussed the possible internet threats facing the world.They agreed that the only way to deal with internet security threats was to trust each other and strengthen cooperation.The threats cannot be solved by any one country alone.And for these reasons,countries would have a greater chance of trusting each other in dealing with such threats.
Though great efforts were made to issue common regulations for the internet,few results have been achieved yet.There.s still a long way to go for unified global internet security rules and regulations.
21-1、【单选题】There areto maintain cyberspace security.
【A】：no unified international regulations
【B】：unified international regulations
【C】：worldwide unified international regulations

21-2、【单选题】Maintaining web security is for China.
【A】：easy
【B】：a piece of cake
【C】：difficult

21-3、【单选题】The only way to deal with cyber security threats was to.
【A】：depend on China
【B】：strengthen international cooperation and trust each other
【C】：depend on the UN

21-4、【单选题】results have been achieved,although great efforts have been made to make the common regulations.
【A】：A lot of
【B】：Few
【C】：Good

21-5、【单选题】handed in a draft "Code of Conduct on Information Security".
【A】：China only
【B】：The United States
【C】：China (and some other countries)

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