Got a moment — or, perhaps, 15 seconds? In the age of fragmented time, TikTok, which is a massive hit in China right now, can perfectly fill in the gaps when people have nothing 【小题1】 (good) to do between two events; its daily plays 【小题2】 (spread) over one billion in the past few years. The Vine-like app allows users to produce creative short videos that combine music with mouth shapes or body moves. They can dance, sing, cook or do 【小题3】 their hearts desire.

【小题4】 (launch) in September 2016, TikTok is owned by Zhang Yiming, one of China’s top tech leaders; he chairs ByteDance. Similar to how Vine worked 【小题5】 a time-limited video platform, TikTok is a 【小题6】 (collect) of brief 15-second music videos, mainly focused on young people, 【小题7】 it’s certainly suitable for all ages.

On the platform, childish and strange behaviors are 【小题8】 (true) acceptable. In high-pressure world, it is no surprise that TikTok has become so successful – all you need to do is pick up your phone and open the app to relieve some stress and have 【小题9】 laugh. The app pushes related videos and products based on users’ preferences and consequently, TikTok can be quite addictive – many people just want to enjoy a few minutes at first, but end up 【小题10】 (consume) several hours’ video time.

Have you ever heard the story of Internet? We are all busy 【小题1】(talk) about and using the Internet, but how many of us know the history of the Internet?

Many people are 【小题2】(surprise) when they find that the Internet was set up in the 1960s. At that time, computers were large and expensive. Computer network didn't work well. If one computer in the network broke down, then the whole network stopped. So a network system had to be set 【小题3】. It should be good enough to be used 【小题4】 many different computers. If part of the network was not working, information could 【小题5】(send) through another part. In this way computer network system would keep on 【小题6】(work) all the time.

At first the Internet was only used by the government, but, in the early 1970s, universities, hospitals, and banks were allowed to use it, too. However, computers were still 【小题7】(expensive) than they are and the Internet was difficult to use. By the start of the 1990s, computers became cheaper and easier 【小题8】 (use). Scientists had also 【小题9】(develop) software that made “surfing” the Internet more convenient.

Today it is easy to get online and it is that millions of people use the Internet every day. Sending E-mail is more and more popular 【小题10】 students.

Can advertising support a free Internet?

The supporters of an open, democratic Internet, funded mainly by advertising, are facing some big questions about how their vision will unfold．A freely accessible digital world, 【小题1】 websites and social networks are open to all, is the dream of many．But critics wonder if this is desirable or even possible．

Brands 【小题2】(shift) a huge proportion of their marketing budgets into online advertising in recent years．But while many campaigns hit the spot, others 【小题3】 be annoying, intrusive and irrelevant．

To discuss the future of online advertising, the Guardian teamed up with advertising technology provider AppNexus to run a roundtable discussion．The discussion was conducted under the Chatham House Rule, where comments were made on condition that they were not attributed to the speakers, 【小题4】(encourage) a free-flowing discussion．

A key point of argument in the discussion was 【小题5】 the Internet should be funded．One participant was passionate about the ad-funded model: "It is a wonderful tool for accessing information, for consuming information and for the distribution of brands．"But another thought that the quality of content on the Internet inevitably suffers "【小题6】 you have other resources to fund it．"There are fears that ad revenue is insufficient to pay for all the content that is needed for the web．"Generally speaking, the ad-funded model puts a downward pressure on the quality of content．"

The discussion returned to the question: will advertising continue as the main source of funding for the web, 【小题7】(fuel) its growth? Digital advertising faces some serious challenges if it is to keep the web free-one of which is concerns over the ethics of tracking people's online behavior 【小题8】 their permission．The success of online ad campaigns is determined by the data that brands can access about Internet users．How old are they? What are their interests? Are they male or female, single or with children? Much of this data will be collected from cookies 【小题9】(download) on to users' computers．Cookie data allows web publishers to track users' online journeys and observe the actions they take on different websites．They can then sift through（筛选）data to identify 【小题10】（appropriate）places to run the ads．